After waking from sleep, my Dock seems groggy. I have to turn off hiding through the Apple menu to get it to show. The magnification starts to work and freezes. I can still launch programs. It doesn't seem to recognize when the mouse is hanging over it - the program names don't show and the little symbol that's supposed to show when you're over the divider line doesn't show. I trashed the preference file and quit the Dock with Activity Monitor but it makes no difference. The only solution is to wait like 5 minutes and go on with my work. Eventually it seems to come back.