Can't play it anymore, I guess. Whenever I start a new world or go on a server and press "W" for forward, I can't stop moving forward until I randomly stop. From then on, I can only jump, and whenever I click the movement buttons it just switches the item slot, nothing else. (Not even fog or inventory!) If anyone knows what's going, please help. (Vanilla. Absolutely no mods or anything. I uninstalled 3 times and produced the same result!)
If it only affects the offline client/standalone it might have something to do with your computer.
Good idea!