quick look problem

Hi. For some reason recently whenever I use Quick Look, it not only displays a preview of the image I've selected, but also displays another image behind it of this random other picture I have on my computer. I can't think of any reason for this. Help?

You could try going here
HD/Users/YourtUserName/Library/Preferences/
and moving this file
com.apple.QuickLookDaemon.plist
to your Desktop.

Not sure, but you might need to Restart to get it to make a new plist set to defaults. You could just try QuickLook first, and if it's the same, then Restart. And let us know if this helped.