[Marv]

Originally Posted by organic-hosting

In the NNTP settings in your admin control panel. Check out the option for "organization check". See if that changing your values fixes your issues. It did for me...

You got me wrong, organic.
The option "organization check" is already set. The problem is, that if I post a new thread in the forums, gateway.php is sending them to the newsgroups and creates not only the single post I?ve written before - it generates a second one too with the same message-ID.
When I take a closer look at these two postings with a newsreader, they appear as two different posts. One as thread starter (i.e. with msg-no. xxxxx1), one as a reply to it (with msg-no. xxxxx2).

In my forums it?s still a single post (and only the "organization check" prevents the re-import to the forums) - but not in the newsgroups. There you?ll find 2 postings. One as thread starter, the other one as a reply to it (marked with the prefix "Re:" ).
Haven?t had this problem before the update and changed non of the new updated files - and I have no clue, what?s going on...