The backgrounds used in these themes are the artwork of Cap'n Jim Varner. His artwork is used by permission. Here is the disclaimer from Cap'n Jim's site:

No graphics, music, themes or other material obtained from this site may be reproduced, transmitted or distributed in whole or in part without the express permission of both the author and the respective trademark holders. As trademarked material, any use or misuse can result in severe legal liability. The author makes this material available for your personal viewing pleasure only, and by downloading material from this site, you signify that you agree to these terms, and thereby assume any and all liability resulting from its use or misuse.

All Mini screen shots are 512x384 and all full-screen shots are 1024x768. For more recent backgrounds, I have added a Captain's Log section, which contains information about the image, Cap'n Jim's feelings about it, credits etc. Some themes won't have this entry, since Cap'n Jim only keeps his images on his site for a period of time. I have downloaded these older images them before he started posting this information.