Hm, this is odd. Recently the game has been momentarily freezing up at random points. Usually for about 1 or two seconds, and not terribly often. Also; it never does this with Fallout 3 or TF2; so I wonder what the problem could be...
I've been getting this as well. Nothing on my computer has changed, and it worked PERFECTLY when I first played it. It's not 'gamebreaking' but I'm definately noticing it, and it's annoying when it's like HI THERES A TANK IN F--------------------------------you're dead.
edit: Nice post farmrush. I would've added a comment about how broken it is to emphasise further though (thanks to vesper for enlightening me on this one).
If one team makes it to the end on level one with near full health, they get roughly: (100+150)*4 = 1000 points. Lets assume they die OUTSIDE THE SAFE ROOM every other level. They end with 1050 points..
The other team makes it to the end and dies at the end INSIDE the safe room, never properly making it to safety once. They get something like (I might have these multis wrong, but it makes no difference, as the first and last are correct) 100*1 + 100*1.2 + 100*1.4 + 100*1.5 + 100*2.0. I think these ARE wrong but it doesn't really matter as the middle 3 are all below *2. Adding it up gets 100 + 120 + 140 + 150 + 200 = 710 points. CLEARLY this team is far, FAR superior. They've gotten 500% distance vs 102% distance. And they've lost, by a landslide.