Unable to pause the game, open the inventory, open chests, initiate chat, or do anything that causes another interface to open over the game.
This causes the game to freeze for a few seconds, then produces a crash report, which I have attached.
This is on a completely fresh copy of Minecraft, with no mods, and on both SMP and single-player.
30th Duplicate of MC-658, please use the search function to see if your bug has already been submitted. Currently over 55% of tickets are being closed as duplicate.