Serendipity Forums

I just installed Serendipity, but I'm having a problem. I did a fresh install of Serendipity 0.9.1, and then copied a few tables from an other (older) installation (on an other server) so that I had all entries, images and comments back.
That's all fine, but for some reason commenting does not work. My blog shows the old comments, but when I (or someone else) try to add a comment, nothing happens. In the browser nothing happens ("loading..."), and from that moment my blog doesn't work at all anymore, until I reboot my server (Apache on a Windows XP machine).
Any suggestions what can cause this problem?
Here’s the link to my blog: http://kortefrans.student.utwente.nl

Sorry, the link should be http://kortefrans.student.utwente.nl/weblog.

I now changed some setting, I turned the option "Send comment announcements?" off, and now there seems (!) to be no problem. When you add a comment, it says "Your comment was successfully added." But the comment then isn't added. And when I look in the table "serendipity_comments" I can see there isn't a row added.

Suggestions how I can fix this?

Okay, I'm just shooting in the dark here, but the recommended upgrade path is different from the path taken here.

I recommend getting an SQL dump of your old database (the one on a different server), installing the old Serendipity onto the new server (copying or doing a clean install, whatever's easier), restoring the database on the new server, then installing 0.91 (or better yet, a 1.0-alpha nightly) on top of the older version. When you go to your admin panel, it should upgrade the whole database to the newer version.