Thumbnail preview of jpg images broken (feature or bug)

[DAVID BENTLEY]

I just transferd some images over from a windows
machine that I have taken
with my digital camera to give F-Spot a try and
noticed that they no-longer
get thumbnailed in a Nautilus view of the folder that
they have been copied 
to.

Is this a feature or a bug.

What you get is what looks like a slide with an image
of a tree and the sun on it.

This is also what is shown for the images if the
folder is viewed with gThumb.

Any ideas what the problem might be.