BuddyPress.org

OK – what I did now:

1. I deleted everything that is, keeping the wp-config.php

2. WPMU works, I could delete blogs, create new ones

3. I copied the BP-Components per ftp in plugins/buddypress (which I created anew)

4. BLANK – everywhere

5. NO entry in the PHP-Log at all

6. Deleted the BP-COmponents per FTP, WPMU works again just fine

I guess the activation of the activated BP-Plugin (as descriped above…) caused somehow a DB-Messup.