This is quite possibly on purpose, but I don't know. Minecraft Username: WhiteRaptor Brief Description: Bonemeal can no longer be used on grass that is under a certain level of luminescence. Instructions: 1. Make a dark room with a grass floor. 2. Right click bonemeal on grass. How many times did you recreate this bug?: I used up a whole inventory of bonemeal before I noticed. Result: No tall grass and flowers grew. Expected Result: Tall grass and flowers. Evidence: Really?
Nope, it worked before. And there is nothing about it in the 1.3.1 or 1.3.2 patch notes. So either it is a bug, or it was done on purpose. I just want to know.