I installed navbar on D7.18 and it doesn't seem to function at all. Here's what I see on /admin: http://d.pr/i/IMdf. The two links on the left at the top both go to the home page. FWIW, this is osx 10.8 on Chrome, Firefox and Safari.
I checked the project for documentation / readme.txt, but couldn't find any. If there are directions I need to follow to make it work, then consider this a feature request for documentation.