I've bought a Powercolor 4850 a few days ago and have been playing Crysis. Yesterday, I upgraded Catalyst driver from 8.7 to 8.8. Now, I notice there are some artifacts when playing at school level (before you faced the 2 tanks). Here are some screen shots. I don't know whether this is due to the new CAT 8.8 driver or problems with Crysis with 4850. Does anyone encounter similar behaviour?