Dear all,
I have just attempted to fix the forums so that they don't børk apart on usernames conflicting in case. I think it works, but please tell me ASAP if you find something that doesn't, so that I can restore them from backup before too many posts are made.
EDIT: On a similar note, I have now also replaced the rest of the homepage with an entirely rewritten version. Hopefully, you shouldn't notice any changes at all, whatsoever, but if you do and they are for the worse, please tell me.