[steilenhang]

OK, now I reverted all the database tables I edited, and the problems remains. There must be something wrong with the installation then.

What is the best thing for me to do? Remove buddypress completely and install it once more?

[steilenhang]

I did that because the old version was hacked to pieces by the previous webmaster. I tested my upgrade-method locally, but when I did it live these problems showed up.

There shouldn’t be need for any database upgrade scripts because the database is new. I just inported som data, I did not replace the tables with the old ones.