This morning I was greeted by an update icon in my system tray.
I wish I could remember what the updates were, I remember one was for daylight savings time, and the others I can't recall, there were about 4.
Well, after the update a reboot was required.
After the reboot the only part of my desktop that I can see is the upper left quadrant.
I tried restarting X, didn't change.
rebooting didn't help.