Any time I open a inventory window, or any item that holds an inventory (anvil, crafting table, etc...) my game crashes. I upgraded to the 1.4.4 prerelease because I thought this bug would be fixed, but it's not. I've tried reinstalling 1.4.2 and it still doesn't resolve the issue. The game is currently unplayable to me because of this in multiplayer and single player modes.