I don't know if you cancelled the "NoSave" already, but it's still easy to download images by clicking on them in Netscape. To be honest, the only way to protect artists' images is to keep them off the Internet - don't upload them. Whatever method you try to use (watermarks, NoSave, NoCache, background image, javascripts, copyright notice, encryption, etc.), some thief will find a way to steal your image if he wants it.