lately i've been having an issue with my mac. for some strange reason the dock will refuse to mouse over magnify and if it does the last thing i hovered over stays blown up for a bit. all the items still work but the dock just seems to not be graphically working right. any ideas what could be causing this?
Open the terminal (Applications > Utilities > Terminal) and type "killall Dock". Obviously without the "s. That'll fix it. I've not had that problem since the 10.4.3 update though.