I'm having a problem getting the images for the various admin functions to load. I keep getting a:

Forbidden
You don't have permission to access /beta/images/admin/backup.gif on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

But the image is there and in the right directory.

Is it only the backup? Is this a new install? Have you added or modified anything anywhere on the site?

Check the permissions (chmod) on the folders and files in question. Make sure the folders is 775 and the files are 664