I'm having the same issue, but only on the 8-bit warp zones. Meat Boy rapidly bounces up and down on the ground and my jump key generally won't register unless I'm sliding down a wall. I've unplugged my keyboard while leaving my controller connected (and vice-versa) to no avail. Is there any sort of tweak or console command that will fix this?
EDIT: Running the game in windowed mode seems to fix the problem. Not as comfortable as running it fullscreen, but I'll deal.
Last edited by Hidenozuke: 12-09-2011 at 08:19 PM.
Reason: Update on the issue