I've implemented some mechanisms to reduce post and PM spam and some of these have been disabling member accounts. Basically, the member usergroup which you all are a part of somehow inherited the banner usergroup permissions disabling anyone access to the forums.
I think I've fixed it, but if not, please report problems to neumadr at gmail dot com or use the contact form at the bottom of the forum.
Nobody's been banned. Know that you will never be banned without fair warning.
- Mahz