Say Yebo’s client wants to leave an html version of his entire navigation in the footer of every website page. He run his site through two SE simulators and the search engines are able to follow his drop-down menus at the top of each page – so this seems like overkill to him. He heard that footers filled with repeat navigation can cause problems because they increase the rate of dupe content on pages. Also, it looks ugly because the entire sitemap is squashed into the footer.

http://www.highrankings.com/forum/index.php?showtopic=41212