Here are the problematic images, One is a JPG created by adobe photoshop. (this one does give the thumbnail decoration)
The other is a PNG image, created by inkscape, and doesn't receive the thumbnail background. -- png and jpg thumbnails are different size and border https://launchpad.net/bugs/56343 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
