With so many +1s - can you checkout the code for the CMS page and
change the template that holds the banner?
https://svn.apache.org/repos/asf/mahout/site/mahout_cms/trunk/ is where
the content of the CMS based page are stored. The banner is part of the
template under templates/standard.html
To test your changes you might want to go through multiple local build
cycles. For more info on how to do that see there
Would be great to see this change as a patch in JIRA.