I have trouble with weapons being stuck so that I can't switch weapons -- especially bad after picking up a chainsaw and losing access to all guns. The number keys just don't respond. I don't have anymore data to give about the specific problem (sorry). BTW, this is under Kubuntu Linux 13.04 with an 3/5 GHz Ivybridge i7 and 8Mb of 1.6 Ghz ram and a P8Z77 MoBo. The version is simply the one from the Ubuntu repository, but I assume 1.33 since its been out for a while.