Error in contact form

Hi!

When using the contact form, the form itself is "kind of" displayed all the time, even when it's not active and not all of it can actually be seen.

If you look at http://stimon.kochsiek.org/home/kontakt you can see at the bottom of the page "Eine Eigenkopie dieser Mail erhalten" (Send a copy of this mail to yourself).

How can that be fixed?

Jens