Hello, whenever I join a server or single-player after a few second my keyboard won't work. I can still use my mouse as I'm able to change my view, but I can't run, walk, or anything on the keyboard. I used to be able to just hit escape and it would fix it but not this time. I can't move anything.
I've tried force updating and that didn't help. I'm running it on a Macbook Pro Retina with Moutain Lion.
This just started happening to me today, after updating to 1.4.6. I played just a few days ago on 1.4.5 and I never saw this problem. Now on both new and previously existing games, both survival and creative, I can move once and then the keyboard (including the ESC key) becomes unresponsive.
I can still cmd-tab away from the Minecraft and back. So the keyboard is fine, it's just Minecraft ignoring it. After leaving the window and coming back the keyboard works again for one more move.
It turns out a simple restart of the computer made it work again. I don't know why restarting the game didn't work but restarting the computer did. I highly doubt it's a keyboard driver thing, as that would be updated with the OS not Minecraft, and there has not been an OS update since earlier in the week when I last played Minecraft.