Hi Stefan,
I just signed-up to the forum (and posted a question/bug) however when I tried to go back to my profile, by clicking the link in the top right of the site, I got an error message page...

Checking the URL against the welcome page / initial profile edit page I got when I first registered, I think there is an error in the URL(s) being generated...
For reference, here are the links I was clicking that resulted in errors (see red box)...

Thanks,
Martin