the day before yesterday I updated my Firefox to 9, with the success that in my wiki www.die-absolute-theorie.de the navigation has slipped under the articles. Well, at first I thought it would be time to re-datenonate the wiki. On the other hand, I was a bit of a ambition, because I am an IT specialist myself and would have to get it solved myself. Also in the Google Preview in the search results the navigation was always displayed slipped. The solution is: Go to skins/Monobook and search for the KHTML.css. Here you adjust the margin-left from 0 to 0.5. I don't know what side effects that might have. But the Firefox 9 has been displaying it correctly since then. If necessary, you need to reload the CSS by control + F5.