On my previous post (link) about this, the port was just in a state of "It works for me". But as commented on the post and I heard from others it wasn't working.
But for a new project it was required to work again :)
So after some little changes everything was working. As prove my colleague Dieter ported his blog from wordpress 2.5. Thanks to Dieter for the help.
The module can use a cleanup, but it works.