The latest patch just fixes an extremely rare and minor glitch involving boss doors that only a speed runner with hundreds of hours of practice is likely to ever find.
Apologies to everyone confused about why there was suddenly an update and especially to any who have slow download speeds. Given that it has been nearly a year since the last patch and this being such a tiny update, it seems unlikely there will be any significant patches after this.
We've put a bunch of our games in this week's Humble Weekly Bundle, and even threw in some great merchandise for the high rollers. You can give all of it to charity, so stop complaining and help somebody else for once in your life.