(Before I start, I'd just like to say this isn't a Poker Night bashing post, I'm just curious to see if others are having the problems as well)

So just started up Poker Night, and I'm liking the gameplay, but man, it's loaded with bugs and the bad optimization is already evident. Shadows on high quality are extremely shitty (no smoothing whatsoever on self-shadows), there appears to be no built-in AA filter, though turning AA on in the drivers control panel enables AA to a certain degree. There tons of strange LOD artifacts, and a bunch of some smaller glitches.

The only problem that really bothers me though, is the performance. My computer can handle Crysis, I play TF2 with the graphics at their max with HD texture mods, and I can keep a steady 61 FPS (VSync Enabled), when I started up poker night, my FPS was fluctuating from 15 FPS to 55 rapidly most of the time. I don't mind low FPS when it stays low, but when you're going from 15 FPS to 50 and back all the time, its hard to get used to it.

Anyone else noticed this as well?

I'm not going to rule out that its just a problem with my computer, but all of my other (and some more graphically intense) games work fine, my temps are staying low, and chkdsk is showing any issues.