The patch is out for it, btw. Should auto update when you launch the game. (steam obviously updates it for you)
Fixes:
Front end:
Fixes server browser crashes. Server browser more resilient against corrupt online service data, and better support for large number of servers.
Several server browser ping issues resolved.
Windows XP stability:
Fixed crash on windows XP at end of round, exit game and display mode changes and.
Proper window style / mouse confinement when starting game maximized on XP .
Options dialog:
Mouse sensitivity setting gives more effect.
Mouse sensitivity loaded on game startup.