I have those red dots appear in place of images for bookmarks. For awhile adding the images worked, then I tried to add new ones today and it would display either:

http://wisnefsky.googlepages.com/wrong.jpg

Or that but a small red circle instead of the ripped paper.

If you figure out what is causing that to appear let me know, as I can't fix it, and if i can't fix it, I'd at least like to know why.

EDIT: Turns out my java is messed up? I had "use java for scaling" on and turning it off fixed the error