On the PC version, there are times whereby my SMART, Jump and Crouch simply lock up and stop working. I need to respawn before it becomes unfrozen. Is this suppose to happen? It happens quite frequently and is quite annoying. Thanks.

I've had times where i start moving really slowly and cant crouch or smart till i spam jump a few times.

hmm this is soo [censored]...
still waiting for the game since i live in the EU,
But with so much bugs on the game & the fact that i've got an ATI card im affraid things will be also buggy for me *-).