Avoid to use image links on your website as navigation or Home-link.
Alternete Text on images have no keyword link value to it!
Its appends to the site content not to the link as an anchor text does.

If your navigation is build on images change it now and use some css to format the links instead.

With adding: < meta name="ROBOTS" CONTENT="NOODP" >
To the Meta Tags of your website the Major Search Engines stop using the DMOZ Listing in the SERP!
Many people having problemes that excpecially Google shows the DMOZ Listing as the Result. No this problem is finaly gone away.