[Typo3] Weird dispaly?

[Martin S]

Finally have some time to spend on our chess club site.

At http://www.bollmora.org

I get a weird wrap of the menu line so that I have an "extra" line below
"Log in" etc. A grey field below login, and an irritating blue line below
"Om klubben". I only see this on my laptop running Gentoo Linux and Firefox
1.5 at 1024x768. On Firefox on Win2000 at the same resolution I don't get
this problem.

Any suggestions as to what is causing this?

Regards,

Martin S