First time using 64 bit client...it's ok, but I understand why some folks prefer 32 bit.
My rogues assassinate dc seemed to fluctuate a lot, I thought maybe a bard or something, though it didn't seem to be affect by proximity to others. What got me looking at it was that it didn't seem to land as often as before. curious if other assassins see the same or if it' was just some bad rolls. the fluctuation was perhaps more concerning.
Combat was super smooth. before if there was some lag it was like a wave and you'd just keep surfing, now it's almost surprising b/c of how smooth it is otherwise.