Basti007,
I have no idea what is going on with your problem.
As best I can tell, you shouldn't have any usertype issues with the searchbot now. In the database query on the 1.0.1 and below, there wasn't a request for the access level of the topics category but I fixed that and all of my "Authorized" results began to appear. It took me a bit to find the problem becasue the forum categories I had set about "Registered User" were empty so there were no results to return.
I no longer have these problems.
If I set my testuser to author, all author and below posts are shown. If I set to editor, all editor and below posts are shown.
I do have to log out and back in after I change the usertype for my testuser to get it to work correctly.
At this point in time, my only suggestion for you is to turn on your debug site option in your Joomla configuration file. Perform a search and copy the database queries performed at the bottom of the page as well as any eror messages that you might get.
You can then send that information to me via my
USer Profile.
Also, information about your PHP version, MySQL version, and server version could shed some light on the problem.
vujsa