This might be a clueless question.

http://de.wikipedia.org/w/wiki.phtml?title=Wikipedia:Impressum&action=ed...

This contains a very out of date and invalid phone number for me. I wanted to change it, but when I logged in and tried to edit the page, I can not.

To be more specific, I get an edit box just fine, but when I go into the edit box and try to delete or add text, nothing happens. It's as if the box is somehow read-only.

This is true in all my browsers: Mozilla Firefox, Safari, IE.