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Sound jumps to consume large portion of CPU resulting in major periodic FPS drops (severe)

Fireworks pushed by water / fired horizontally out of loaded chunks cause client to hang

Minecraft hangs entire MacBook Pro

Loading a world in fullscreen mode crashes the game.

Entities can't attack the player when they are falling

Game never starts on linux (took about 7 minutes before 13w41a)

Launcher doesn't load without Internet connection

Lag on resume from minimize

hang forever on launch, on OS X, after quit via command-Q

The launcher doesn't start