Reminders Screen "Invisible"
I have just loaded Mountain Lion on a 2010 IMAC and the Reminders App starts up but the screen appears translucent, I can see the outline on the desktop but it has no content. I cannot see any content (See image below, the outline you can see is the REMINDERS window sitting on top of the desktop image). All reminders are appearing on my iphone and ipad but I cannot see them at all on my IMac. Also when I switch to the REMINDERS app the FILE menu does not display any content when it is clicked on. Anyone have a solution to this?
iMac (27-inch Mid 2010), OS X Mountain Lion