jamie - 9:17 am on Mar 29, 2006 (gmt 0)

there are digital copyrighting services which implant a copyright in the image when you save it as a gif or jpg. one of them works well as a plugin for photoshop.

if you find your image elsewhere on the web, then you can prove it's authenticity with the digital copyright notice.

however, this still does not prevent a screen capture.