Earlier today my menu bar crashed, it was jammed and unresponsive. When I restarted my 12" Powerbook the system icons had disappeared, i.e. no Spotlight, no clock, no power, etc. Adium, Skype and Salling Clicker still show fine. If I try going to Preferences to show the clock, the box is unticked, but when I try and retick it nothing happens. HELP!