Hello! Just a bit ago a circuit tripped while I had a bunch of stuff on. 2 computers were on, a Mac mini and a PC. When I rebooted the Mac, I saw that the desktop wallpaper had changed to the Leopard default and my TM disk had the generic FireWire disk icon. I had the wallpaper set at something different before. If it matters, System Preferences was open, and at the wallpaper selection screen and I was picking a background. The rest of the computer seems fine. What happened?