Sometimes Ill wake up my mac from sleep mode and things wil be changed. I have my background set to change every 30 min, and every once in a awhile it will revert back to the purple aura background, and that background isnt even in my wallpaper folder. Today it did that, and also changed my display mode. My icons were huge, and the taskbar on the top was bigger. It went from 1024x800 to 800x600, or whatever the numbers are. I also have an old crt monitor, i dunno if thats messing up ****.