Can't Find tab-right-ie6.png and other images

Hey There,

We are working to eliminate "page not found" errors on a large zen site. We have a problem with the tab-right-ie6.png file and others that are simular in the zen image directory. We are receiving the following log message:

Type page not found
Date Tuesday, April 12, 2011 - 16:35
User Anonymous
Location http://www.raystedman.org/sites/all/themes/raystedman/images/tab-right-i...
Referrer http://www.raystedman.org/new-testament/mark
Message sites/all/themes/raystedman/images/tab-right-ie6.png
Severity warning

It seems the code is looking for the file in the image directory of the base theme of the site ("raystedman") instead of the zen directory. A locate for the file on the server indicates the file is located here but we are not getting to it for some reason.

/var/www/vhosts/raystedman.org/httpdocs/sites/all/themes/zen/zen/images/tab-right-ie6.png

Any help you can give us to sort this out would be appreciated. Thanks! Greg