So I just upgraded to Mavericks and am getting brief freezes every 30 minutes or so. They usually go away if I mash the force-quit keyboard shortcut, whereupon the screen will rearrange with whatever keyboard commands I had put in beforehand. Is anyone else finding this odd behavior on their machine? I'm afraid it's some third party thing (i.e. I use SteerMouse, DropBox, GrowlVoice, and other services).