From: Matthew Lybanon on
Starting only a few days ago, when I use the "Quick Look/Slideshow"
button at the top of a Finder window to view some images, everything
works except for one thing: When I choose the "Index Sheet" feature,
instead of thumbnails of the images I see generic "JPEG" icons.
(Choosing Quick Look from the File menu produces the same result.)
Rarely, when I switch from viewing one of the images to the Index Sheet,
the thumbnail of the image I was just looking at shows up for a very
short time. All of the other Quick Look/Slideshow functions work
correctly, and until a few days ago the Index Sheet feature also worked.

I'm running OS X 10.5.8 on a G5 Mac. I have not installed any new
software, and the last update I can find is "Java for Mac OS X 10.5
Update 7" (1.0), about a week ago.

Any ideas, anyone?