My 4 clients still keep freezing every now and then, and finally lead to graphic glitches and client crashes. This started with 3.1. My graphic drivers are up to date, my graphic card isnt overheating and well, its been running smoth before the patch, so I doubt its my hardware...
It only seems to happen if I fly around northrend for a while, been leveling a mid 60 team in outlands without any troubles this afternoon.