The dedication achievement was changed to only require 31 total Daily Challenges instead of 31 consecutive Daily Challenges. (This change is not retroactive, meaning that any non-consecutive Daily Challenges you have done in the past will not count.)
If Ipecac is overwritten by another item, it will now synergize in such a way that it adds +4 damage. (+4 damage in this context is as reported from the Found HUD.) This scales with the Magic Mushroom / Cricket's Head) multiplier and the Eve's Mascara multiplier. This does not scale with the Sacred Heart multiplier or character multipliers (like Judas' Shadow). For more details on how the damage calculation works, see the "Formula Information" sheet of Twinge's spreadsheet
The Epic Fetus and Ipecac synergy is unchanged. (It still gives +40 damage.)
Fixed the bug where Void portal trap doors would not suck you in even if you were standing directly on top of them.
Fixed the bug where Void portal trap doors would instantly suck you in if they spawned underneath you.
Fixed the bug where Void portal trap doors would not properly be animated.
Fixed the unfair Sucker placement on a Monstro 2 room (#1067).
Fixed the incorrect Larry Jr. placement on the Double Trouble room with Larry Jr. and Sisters Vis (#3772).
Changed the difficulty of the Caves room with 4 Small Crazy Long Legs and 2 Mushrooms (#914) by removing 2 Small Crazy Long Legs and 2 rows of pits.
Fixed a softlock in Catacombs room #328 by replacing 2 blocks with poops.
Replaced 2 blocks with poops in Depths/Necropolis room #226. (This room can still soft-lock you on a minimum range build.)
The Mom void teleport has been changed to a void portal. The conditions for it appearing are the same as they were for the teleport (5%, 100+ tear damage or 20+ items).
Fixed the bug with the Incubus + Cursed Eye synergy.
Fixed the bug where Eden could not reset with the R key.
Fixed the bug with the Jacob's Ladder + The Ludovico Technique + Monstro's Lung synergy where it would deal damage to the player.
Fixed the bug where The Compass proc from a Liberty Cap trinket would permanently stay after saving and quitting and continuing (until it happened to proc again).
Fixed the bug with the Incubus + Monstro's Lung + Tech X synergy where only one Tech X would shoot from the Incubus instead of many.
Fixed the bug with the Incubus + Monstro's Lung + Brimstone synergy where only one Brimstone would shoot from the Incubus instead of many.
Fixed the bug with the Incubus + Tech X + Mom's Knife synergy where the player could spam the tear button to shoot a Tech X ring every single frame.
Fixed the bug with the Spear Of Destiny + Maw of the Void synergy where the Spear of Destiny would desync from Isaac after the Maw is activated.
Fixed the bug with Gimpy where it would completely stop working if the player had 23 luck or more.
Fixed the bug with Old Bandage where it wouldn't drop any hearts if the player has more than 29 luck.
Fixed the bug with the Ipecac + Toxic Shock synergy is bugged where Ipecac wouldn't increase the damage of the Toxic Shock. It is governed by the same +4 damage formula listed above.
Fixed the bug with The Ludovico Technique + Proptosis synergy where only the first tick of damage would properly account for the distance that the player was standing from the tear.
Fixed the bug with The Ludovico Technique + A Lump of Coal synergy where only the first the first tick of damage would properly account for the distance that the player was standing from the tear.
Fixed the bug with the Monstro's Lung + Marked synergy is bugged where Marked would act as a range down and prevent angled shots.
Fixed the bug where if the player has Isaac's Heart and uses a Sacrifice Room, they would not get any rewards but still take damage.
Fixed the bug where dropping the Book of Shadows for another spacebar item would kill the shield from a Algiz rune, Celtic Cross, The Polaroid, or Empty Vessel.
Fixed the bug where taking Tech X after taking Ipecac would not properly update your stats.
Fixed the bug where Breath of Life did not work with the Broken Remote trinket.
Fixed the bug where if a teleport card was used at the same time as exiting the room, the teleport would be canceled.
Fixed the bug where Experimental Treatment could kill Blue Baby if he was at one soul heart remaining.
Fixed the bug where the Boss Rush would spawn the non-boss version of Gurglings.
Fixed the bug where Stone Chests did not have an icon on the minimap. (They now have a unique icon that is square.)
Fixed the bug where Spike Chests did not have an icon on the minimap. (They now have a unique icon that has a dark-red top and spikes.)
Fixed the bug where Eternal Chests did not have an icon on the minimap. (They now have a unique icon that looks like a white chest.)
Fixed the bug where Sacks did not have an icon on the minimap. (They now have a unique icon.)
Fixed the bug where the beam of light that leads to the Cathedral would fail to spawn if there were lots of explosions or tears on the screen.
Fixed the bug where having two Steam Sales would result in free Devil Room and Black Market items.
Fixed the bug where if the player has The Candle or Red Candle held over their head while they attempt to leave a crawlspace, the game would soft-lock.
Fixed the bug with the Dr. Fetus + Tech X synergy where the ring would generate black hearts for no reason.
Fixed the bug with the Incubus + Brimstone + Tech X synergy where the Incubus would shoot a laser ring instead of a blood ring.
Fixed the bug with the Spear Of Destiny + Kidney Stone synergy where the spear would desync from Isaac when the Kidney Stone activated.
Fixed the bug where the state of Guppy's Hair Ball would be reset after saving, quitting, and continuing.
Fixed the bug where using Void to consume Breath of Life did not actually grant any invulnerability. Now, it functions as a 1-charge Void and a Breath of Life at the same time.
Fixed the bug with BBF in L-shaped rooms where it would phase through the wall.
Fixed the bug where if you selected Daddy Long Legs or It Lives from the Bestiary and went back to the stats screen, the sprites would still be visible.
Fixed the bug where if the player had 1 familiar, used Box Of Friends, touched an item pedestal with another familiar, and then entered a new room, the two familiars would erroneously be stacked on top of each other.
Fixed the bug where you could use Glass Cannon to steal Devil Room items by using it to heal you for 1/2 of a soul heart.
Fixed the bug where it was possible to go into a Void portal during the "jumping into the chest" animation.
Fixed the bug where killing an angel spawned from a statue outside of an Angel Room would prevent an angel from an Angel Room from dropping a key piece.
Fixed the bug where it was possible to use We Need to Go Deeper! inside a crawlspace or Black Market (which had the potential to cause softlocks).
Fixed the bug with the Isaac's Tears + Brimstone + Chocolate Milk synergy where tears could be charged infinitely.
Fixed the bug with the Mom's Box + Cracked Crown synergy where it would not give you double stats.
Fixed the bug where Gurglings from Delirium or Delirious or would show up as normal Gurglings.
Fixed the bug where loading a mod would not properly overwrite the floor STB files.
Fixed the bug where the player would be soft-locked with no bombs on the Double Room room with 1 Rag Man and 2 Rag Mega (#3732).
Fixed the bug where the items from The Book of Sin were unseeded.
Fixed the bug where bombing an angel statue and killing the angel would result in a key piece becoming unobtainable.
Fixed the bug where the game would crash on most versions of Linux.
Fixed the bug where in certain situations, getting a Machine from a Gift Plate would soft-lock the game. (Machines now spawn in the center of the room.)
Mom's Box now works with trinkets consumed by Smelter or Gulp!.
Fixed the bug where Robo-Baby 2.0 does not unlock anymore after defeating the Computer Savvy challenge.
(patch notes collected by Zamiel + henry92 + Cyber_1)

The dedication achievement was changed to only require 31 total Daily Challenges instead of 31 consecutive Daily Challenges. (This change is not retroactive, meaning that any non-consecutive Daily Challenges you have done in the past will not count.)
If Ipecac is overwritten by another item, it will now synergize in such a way that it adds +4 damage. (+4 damage in this context is as reported from the Found HUD.) This scales with the Magic Mushroom / Cricket's Head) multiplier and the Eve's Mascara multiplier. This does not scale with the Sacred Heart multiplier or character multipliers (like Judas' Shadow). For more details on how the damage calculation works, see the "Formula Information" sheet of Twinge's spreadsheet
The Epic Fetus and Ipecac synergy is unchanged. (It still gives +40 damage.)
Fixed the bug where Void portal trap doors would not suck you in even if you were standing directly on top of them.
Fixed the bug where Void portal trap doors would instantly suck you in if they spawned underneath you.
Fixed the bug where Void portal trap doors would not properly be animated.
Fixed the unfair Sucker placement on a Monstro 2 room (#1067).
Fixed the incorrect Larry Jr. placement on the Double Trouble room with Larry Jr. and Sisters Vis (#3772).
Changed the difficulty of the Caves room with 4 Small Crazy Long Legs and 2 Mushrooms (#914) by removing 2 Small Crazy Long Legs and 2 rows of pits.
Fixed a softlock in Catacombs room #328 by replacing 2 blocks with poops.
Replaced 2 blocks with poops in Depths/Necropolis room #226. (This room can still soft-lock you on a minimum range build.)
The Mom void teleport has been changed to a void portal. The conditions for it appearing are the same as they were for the teleport (5%, 100+ tear damage or 20+ items).
Fixed the bug with the Incubus + Cursed Eye synergy.
Fixed the bug where Eden could not reset with the R key.
Fixed the bug with the Jacob's Ladder + The Ludovico Technique + Monstro's Lung synergy where it would deal damage to the player.
Fixed the bug where The Compass proc from a Liberty Cap trinket would permanently stay after saving and quitting and continuing (until it happened to proc again).
Fixed the bug with the Incubus + Monstro's Lung + Tech X synergy where only one Tech X would shoot from the Incubus instead of many.
Fixed the bug with the Incubus + Monstro's Lung + Brimstone synergy where only one Brimstone would shoot from the Incubus instead of many.
Fixed the bug with the Incubus + Tech X + Mom's Knife synergy where the player could spam the tear button to shoot a Tech X ring every single frame.
Fixed the bug with the Spear Of Destiny + Maw of the Void synergy where the Spear of Destiny would desync from Isaac after the Maw is activated.
Fixed the bug with Gimpy where it would completely stop working if the player had 23 luck or more.
Fixed the bug with Old Bandage where it wouldn't drop any hearts if the player has more than 29 luck.
Fixed the bug with the Ipecac + Toxic Shock synergy is bugged where Ipecac wouldn't increase the damage of the Toxic Shock. It is governed by the same +4 damage formula listed above.
Fixed the bug with The Ludovico Technique + Proptosis synergy where only the first tick of damage would properly account for the distance that the player was standing from the tear.
Fixed the bug with The Ludovico Technique + A Lump of Coal synergy where only the first the first tick of damage would properly account for the distance that the player was standing from the tear.
Fixed the bug with the Monstro's Lung + Marked synergy is bugged where Marked would act as a range down and prevent angled shots.
Fixed the bug where if the player has Isaac's Heart and uses a Sacrifice Room, they would not get any rewards but still take damage.
Fixed the bug where dropping the Book of Shadows for another spacebar item would kill the shield from a Algiz rune, Celtic Cross, The Polaroid, or Empty Vessel.
Fixed the bug where taking Tech X after taking Ipecac would not properly update your stats.
Fixed the bug where Breath of Life did not work with the Broken Remote trinket.
Fixed the bug where if a teleport card was used at the same time as exiting the room, the teleport would be canceled.
Fixed the bug where Experimental Treatment could kill Blue Baby if he was at one soul heart remaining.
Fixed the bug where the Boss Rush would spawn the non-boss version of Gurglings.
Fixed the bug where Stone Chests did not have an icon on the minimap. (They now have a unique icon that is square.)
Fixed the bug where Spike Chests did not have an icon on the minimap. (They now have a unique icon that has a dark-red top and spikes.)
Fixed the bug where Eternal Chests did not have an icon on the minimap. (They now have a unique icon that looks like a white chest.)
Fixed the bug where Sacks did not have an icon on the minimap. (They now have a unique icon.)
Fixed the bug where the beam of light that leads to the Cathedral would fail to spawn if there were lots of explosions or tears on the screen.
Fixed the bug where having two Steam Sales would result in free Devil Room and Black Market items.
Fixed the bug where if the player has The Candle or Red Candle held over their head while they attempt to leave a crawlspace, the game would soft-lock.
Fixed the bug with the Dr. Fetus + Tech X synergy where the ring would generate black hearts for no reason.
Fixed the bug with the Incubus + Brimstone + Tech X synergy where the Incubus would shoot a laser ring instead of a blood ring.
Fixed the bug with the Spear Of Destiny + Kidney Stone synergy where the spear would desync from Isaac when the Kidney Stone activated.
Fixed the bug where the state of Guppy's Hair Ball would be reset after saving, quitting, and continuing.
Fixed the bug where using Void to consume Breath of Life did not actually grant any invulnerability. Now, it functions as a 1-charge Void and a Breath of Life at the same time.
Fixed the bug with BBF in L-shaped rooms where it would phase through the wall.
Fixed the bug where if you selected Daddy Long Legs or It Lives from the Bestiary and went back to the stats screen, the sprites would still be visible.
Fixed the bug where if the player had 1 familiar, used Box Of Friends, touched an item pedestal with another familiar, and then entered a new room, the two familiars would erroneously be stacked on top of each other.
Fixed the bug where you could use Glass Cannon to steal Devil Room items by using it to heal you for 1/2 of a soul heart.
Fixed the bug where it was possible to go into a Void portal during the "jumping into the chest" animation.
Fixed the bug where killing an angel spawned from a statue outside of an Angel Room would prevent an angel from an Angel Room from dropping a key piece.
Fixed the bug where it was possible to use We Need to Go Deeper! inside a crawlspace or Black Market (which had the potential to cause softlocks).
Fixed the bug with the Isaac's Tears + Brimstone + Chocolate Milk synergy where tears could be charged infinitely.
Fixed the bug with the Mom's Box + Cracked Crown synergy where it would not give you double stats.
Fixed the bug where Gurglings from Delirium or Delirious or would show up as normal Gurglings.
Fixed the bug where loading a mod would not properly overwrite the floor STB files.
Fixed the bug where the player would be soft-locked with no bombs on the Double Room room with 1 Rag Man and 2 Rag Mega (#3732).
Fixed the bug where the items from The Book of Sin were unseeded.
Fixed the bug where bombing an angel statue and killing the angel would result in a key piece becoming unobtainable.
Fixed the bug where the game would crash on most versions of Linux.
Fixed the bug where in certain situations, getting a Machine from a Gift Plate would soft-lock the game. (Machines now spawn in the center of the room.)
Mom's Box now works with trinkets consumed by Smelter or Gulp!.
Fixed the bug where Robo-Baby 2.0 does not unlock anymore after defeating the Computer Savvy challenge.
(patch notes collected by Zamiel + henry92 + Cyber_1)

Hi All,

We've updated the game with more fixes. Please see below. For additional bugs/issues please send to isaac@nicalis.com. Include as much information as possible when reporting bugs. Thanks!

- Fixed Void, Dataminer, Rune Black incorrect
- Fixed Epiphora resetting between rooms and reset incorrectly
- Fixed Humbling Bundle not applying instantly on first shop visit
- Fixed grid entity randomly destroyed when reentering a room
- Changed the way price and modifiers is applied to items, should fix most of the shop/devil issues
- Fixed special rock spawns displaying first anm2 frame of spawned entity
- Fixed Error room + x2 Steam sale
- Fixed hush door consuming keys
- Refixed Ludo + Booger and Explosivo tears
- Metronome fixes
- All EvaluateItems are refering to NumCollectibleHeld instead of m_Collectibles for consistency.
- Fixed Punching bag being able to die.
- Fixed unfair room in Caves
made all Easy Sheol/Cathedral rooms Medium (approved, alot of room were actually medium/hard by design but flagged as Easy)
- Fixed bug in room difficultiy selection making impossible to pick easy rooms in cathedral/sheol and void
- Fixed Book_Worm issue
Made Library and Shops upgrades based on subtypes
Fixed Library/Shop missing rooms ^

Hi All,

We've updated the game with more fixes. Please see below. For additional bugs/issues please send to isaac@nicalis.com. Include as much information as possible when reporting bugs. Thanks!

- Fixed Void, Dataminer, Rune Black incorrect
- Fixed Epiphora resetting between rooms and reset incorrectly
- Fixed Humbling Bundle not applying instantly on first shop visit
- Fixed grid entity randomly destroyed when reentering a room
- Changed the way price and modifiers is applied to items, should fix most of the shop/devil issues
- Fixed special rock spawns displaying first anm2 frame of spawned entity
- Fixed Error room + x2 Steam sale
- Fixed hush door consuming keys
- Refixed Ludo + Booger and Explosivo tears
- Metronome fixes
- All EvaluateItems are refering to NumCollectibleHeld instead of m_Collectibles for consistency.
- Fixed Punching bag being able to die.
- Fixed unfair room in Caves
made all Easy Sheol/Cathedral rooms Medium (approved, alot of room were actually medium/hard by design but flagged as Easy)
- Fixed bug in room difficultiy selection making impossible to pick easy rooms in cathedral/sheol and void
- Fixed Book_Worm issue
Made Library and Shops upgrades based on subtypes
Fixed Library/Shop missing rooms ^

Fixes:

• Reverted the steam cloud saving change from yesterday due to reports of the game being unable to find its save data if cloud saving was turned off
  
• Fixed a crash releated to having multiple trinkets
  
• Fixed a bug where the unlock checks for Ending 19 and Final were reversed in the cutscene menu
  
• Gameplay adjustments

Modding:
Some changes were made to Lua sandboxing due to security concerns. Here's how they affect you:
If you used require("mobdebug").start() in your mods, that should be replaced with StartDebug() to prevent your script from hitting an error, since that only works with --luadebug enabled. This means you'll have to update any lua mods you've released with that line left in. We're very sorry for the inconvenience!
For now we strongly recommend running workshop mods only with --luadebug disabled. This recommendation may be retracted in a later update.
See the debugging page in the tools/luadoc documentation for a tutorial on setting up the debugger.

Changed the way unpacked resources are loaded, due to issues players were frequently seeing where unpacked resources were becoming outdated, players with incompatible legacy mod files or mods applied by the legacy method. Now the game prefers to load files from the pack file first, and if that fails, loads from loose files.

Fixed const-ness of player entity passed to certain callbacks
Fixed an issue where a function for getting the screen position of an entity didn't account for the camera offset or screen shake

:repoop:

Fixes:

• Reverted the steam cloud saving change from yesterday due to reports of the game being unable to find its save data if cloud saving was turned off
  
• Fixed a crash releated to having multiple trinkets
  
• Fixed a bug where the unlock checks for Ending 19 and Final were reversed in the cutscene menu
  
• Gameplay adjustments

Modding:
Some changes were made to Lua sandboxing due to security concerns. Here's how they affect you:
If you used require("mobdebug").start() in your mods, that should be replaced with StartDebug() to prevent your script from hitting an error, since that only works with --luadebug enabled. This means you'll have to update any lua mods you've released with that line left in. We're very sorry for the inconvenience!
For now we strongly recommend running workshop mods only with --luadebug disabled. This recommendation may be retracted in a later update.
See the debugging page in the tools/luadoc documentation for a tutorial on setting up the debugger.

Changed the way unpacked resources are loaded, due to issues players were frequently seeing where unpacked resources were becoming outdated, players with incompatible legacy mod files or mods applied by the legacy method. Now the game prefers to load files from the pack file first, and if that fails, loads from loose files.

Fixed const-ness of player entity passed to certain callbacks
Fixed an issue where a function for getting the screen position of an entity didn't account for the camera offset or screen shake

ːrepoopː

Yep! That's right!

Fixes:

• Fixed a Windows crash caused by an exe modification step in the build process
  
• Fixed a crash related to loading a game save after smelting trinkets
  
• Fixed a crash on startup related to save data
  
• Fixed a crash involving an item that would try to spawn doors in Greed/Greedier mode
  
• Fixed a bug where the player could be hurt by certain fires spawned by their own items
  
• Fixed a bug where the boss clear music could play too soon
  
• Adjusted steam cloud save detection
  
• Various adjustments for balance and fairness :reheart:

Mod tools:

• Fixed a display issue and some default path issues with room editor
  
• Fixed a Mac issue with missing libraries that made the Mac ModUploader
• impossible to launch without a specific dev environment installed

Modding API:

• Generated comments for HTML documentation
  
• Added descriptions of mod callback conditions, arguments and return values, in enums.lua and in HTML documentation
  
• Changed signature of MC_EVALUATE_CACHE callback to pass the player entity
  
• Removed some duplicated casts: Isaac.ToPickup and Isaac.ToEffect. Instead use entity:ToPickup and entity:ToEffect
  
• Added some missing entity casts: ToBomb, ToLaser, ToKnife
  
• Added some methods to player to get joystick inputs
  
• Made player stats modifiable by mods
  
• Removed getters for readonly player stats, since they were made redundant
  
• Added functions such as Isaac.WorldToScreenPosition to convert game coordinates to rendering coordinates

To the brave intrepid Lua modders: We heard your criticism and we understand. It's still early days for the modding API. You can look forward to new possibilities as we open up access to more of the game's features and create more samples for you to base your mods on. We're still mostly focused on bug fixing at this time, so please be patient. This isn't even our final form!

In the mean time, there are some sample mods made by the dev team that have been lurking the dark corners of the workshop. They're collected here. http://steamcommunity.com/sharedfiles/filedetails/?id=835650828

:repoop:

Yep! That's right!

Fixes:

• Fixed a Windows crash caused by an exe modification step in the build process
  
• Fixed a crash related to loading a game save after smelting trinkets
  
• Fixed a crash on startup related to save data
  
• Fixed a crash involving an item that would try to spawn doors in Greed/Greedier mode
  
• Fixed a bug where the player could be hurt by certain fires spawned by their own items
  
• Fixed a bug where the boss clear music could play too soon
  
• Adjusted steam cloud save detection
  
• Various adjustments for balance and fairness ːreheartː

Mod tools:

• Fixed a display issue and some default path issues with room editor
  
• Fixed a Mac issue with missing libraries that made the Mac ModUploader
• impossible to launch without a specific dev environment installed

Modding API:

• Generated comments for HTML documentation
  
• Added descriptions of mod callback conditions, arguments and return values, in enums.lua and in HTML documentation
  
• Changed signature of MC_EVALUATE_CACHE callback to pass the player entity
  
• Removed some duplicated casts: Isaac.ToPickup and Isaac.ToEffect. Instead use entity:ToPickup and entity:ToEffect
  
• Added some missing entity casts: ToBomb, ToLaser, ToKnife
  
• Added some methods to player to get joystick inputs
  
• Made player stats modifiable by mods
  
• Removed getters for readonly player stats, since they were made redundant
  
• Added functions such as Isaac.WorldToScreenPosition to convert game coordinates to rendering coordinates

To the brave intrepid Lua modders: We heard your criticism and we understand. It's still early days for the modding API. You can look forward to new possibilities as we open up access to more of the game's features and create more samples for you to base your mods on. We're still mostly focused on bug fixing at this time, so please be patient. This isn't even our final form!

In the mean time, there are some sample mods made by the dev team that have been lurking the dark corners of the workshop. They're collected here. http://steamcommunity.com/sharedfiles/filedetails/?id=835650828

ːrepoopː

Merry Christmas! Here is a list of major issues fixed by patch 1.04.

This was introduced in 1.03 by mistake when fixing another secret room bug and is sorted out now.

On Linux, we fixed a problem where the screen saver could come up in the middle of the game when using a gamepad.

It should now be possible to delete save slots, even when using the Steam Cloud sync. In 1.03 the delete button often didn't do anything.

Some players notified us about an issue where some Judas achievements were not unlocked for beating the game with Black Judas. This should be fixed now as well.

Apart from these major issues, we also made a lot of smaller tweaks and fixes.
The Mac OS X version will stay at v1.032 for now, we will update it after the holidays.

Merry Christmas! Here is a list of major issues fixed by patch 1.04.

This was introduced in 1.03 by mistake when fixing another secret room bug and is sorted out now.

On Linux, we fixed a problem where the screen saver could come up in the middle of the game when using a gamepad.

It should now be possible to delete save slots, even when using the Steam Cloud sync. In 1.03 the delete button often didn't do anything.

Some players notified us about an issue where some Judas achievements were not unlocked for beating the game with Black Judas. This should be fixed now as well.

Apart from these major issues, we also made a lot of smaller tweaks and fixes.
The Mac OS X version will stay at v1.032 for now, we will update it after the holidays.