Hello,
I've found a really game breaking but that leaves the game unplayable when it occurs. I believe this issue has been reported here as well, but without a reason for it being found.
If you issue a unit command, like Fallback or Hold without a unit selected the game will no longer take any input. This leaves you unable to do anything. Can't open a menu, can't select units. You are forced to alt+f4.
At game start without a unit selected I pressed H, thinking this was the keyboard shortcut for the new elevation map. This also occurs with F, and I am assuming all the shortcuts for unit commands.
CPU: i7 950 GPU: SLI GTX 480 (Just saw a new driver, I will try updating)
RAM: 3x2GB Mushkin DDR3 1600
SoundCard: Sound Blaster X-Fi Titanium Fatal1ty Pro
MOBO: P6X58D-E - ASUS
Thanks!