Okay, so here's something interesting -

My FPS now seems to be pegged at about 40 FPS. I had, like rapstar, just chalked it up to a lot of activity and something server side. 40 was better than 20!

But now I notice that under certain circumstances - when I cast things that trigger certain lighting effects (the blinding paladin talent, certain DH abilities) or I am standing in the middle of a fel effect (by the scouting table in the DH order hall) my FPS shoots up to 60+!

So I am now back to thinking that maybe there's something else going on and wondering if anyone has had a similar experience. Pretty weird!