Yeah it's a known problem, I think just on the PC and only after the patch. Next time you have technical issues, though, you might want to use http://www.gamesas.com/index.php?/forum/139-brink-hardware-and-software-issues-subforums/ to see if it's a known problem.
Edit: Oh, and if I wasn't clear they're working on it. So sit tight, little ducky, our SD overlords will fix all our problems soon enough.