I've been having some problems lately on my mac pro. My dock doesn't do the magnify thing anymore and some other wierd stuff like not being able to drag music files anywhere in itunes. It also just generally feels sluggish. I ran xbench and here is the result. My computer is the red one. If you scroll down you can see how abysmal my disk performance is. Any ideas on what can be going on? I'm running 10.5.1.