I have the same problem. 5850 CFX, i7 950 @ 4.6 No HT, Game setting High with Ultra, no AA. Used 11.10 pre 3 with Cap4 and no Cap. It's great and smooth at first (around 80fps), but after you die a couple of times in multiplayer, Crossfire fluctuates between 20% to 99% on both cards . During these fluctuations the FPS drops and the game stutters to a point where it is unplayable. This is NOT the micro-stuttering experienced in CAP 3. I haven't really seen anyone else post this yet. Thought it was just me and was willing to just play on single GPU...which works fine.