I just started having this problem recently after having some issues with COD4 crashing. I try to assign my mouse 5 button to an action and it keeps coming up as ALT. Which if fine if it still works, but in game when I use the button sometimes it uses the action and sometimes it pulls up the player list - kill/death page, or sometimes does both at the same time (sort of).
Any ideas? I'll try and reinstall it and see if that helps.
Any ideas? I'll try and reinstall it and see if that helps.