brandwijk and dsvb
There are many things that can cause this that are not related to the mod. Just the fact that you both may be using a non-English language file might make a difference. Any check-out or log-in mods could effect it as well.
Please follow the posting tips and answer as many of the questions as you can. Especially, the one about posting your site's address. You can post it as yoursiteDOTcom if you don't want the search engines to grab it just yet.