In chat, backspace deletes by word instead of by character

On mac, drop key drops entire stack instead of one

Extra hearts from health boost are damaged randomly

Minecraft crashes when I maximize window in 1.6.1 on OSX.

Attributes adds damage instead of making it that damage. Example: Diamond sword does 7 damage in 1.5.2 but with the attributes, it does +7 damage, in addition to the one from fists, so now does 8 damage instead of 7.,