I'm finding my game occasionaly locks up briefly (freezes for about 2 seconds), and then drops to desktop..
I can still hear the game carrying on, but can't get back into the game, even when I click on the icon again.
It's as if I've 'alt tabbed' out of the game, but then I'm locked out, and have to use task manager to end the process.
Any ideas as to why this is occuring?

For anyone with this problem.. (there seems to be quite a few on the BiS forums) The only workaround I've managed to find from over there is by use of the 'flush' command.
This allows me to re-enter the game having been forced out by the game dropping to desktop.
Of course it's not solved the problem, as there seems to be no definate answer as to why it's doing it. Plus, another factor in this is I can't go online as the game keeps doing this..