When I am playing Minecraft in Linux, it works perfectly fine, but when I try to play in Windows 7, it refuses to let me walk and do anything else at the same time. If I walk and place a block while walking, I stop moving. It only started happening after I updated to 1.4.2, and it persists in 1.4.4. I'm not using any mods, and I've tried it both with using my mouse, and unplugging it and using my touchpad. This never happens when I play any other game, such as Skyrim or Portal 2. If I hold down a mouse button and then start moving, it works fine though. Any clue what's going on??? I'm totally stumped...
Note: Don't keep your bin folder.