Anyone having any issues with minor juddering on the PC? It's very subtle, but quite annoying. It's similar to Doom 3 engine games before you disable the com_precisetic and com_fixedTic. It's like a tiny hiccup every couple of seconds.
I'm seeing it in Portal 2 in certain areas and I'm not sure why. If I disable v-sync, my framerate goes up to 225+fps so it's clearly not a performance limitation and FRAPS reports my framerate as a solid 60 fps all the time. Things like that really drive me nuts.
I'll probably just go back to the PS3 version for now, but hopefully there is some cvar I can adjust to fix this.