Rickard wrote:

Let me guess. A crashed table?

The collation type of the table was wrong.
I ran the forum on a test server first, which had a strange collation, utf-swedish or something like that. I thought I fixed that all before I moved the forum to the live server. But I forgot a table.
Thanks for your support.

Thanks! the debugging info made it possible to solve my problem.

Unable to fetch subscription info

The message above is shown on the screen when submitting a new topic, or  a reply to an existing topic. The message is submitted OK, but every user in my forum gets the same error.

How can I solve this? Using PubBB 1.2.10 by the way.