It did help to re-install the SP1 like mentioned above. I was though reluctant to do so as I was a bit concerned that it would mess up my FSX-installation. But, everything is working fine here now, and #### ASX is awesome!!
I've experienced the same problems. I've just aborted a flight from Darwin to Sydney. I found ot that the rudder went to a fully right or left position. It centered itself when the nose of the plane pointed directly north. I deleted my fsuipc.dll and fsuipc.ini, and then placed fsuipc 3.53 in modules. Restarted flightsim and it seemed to work...until I got airborn. The aircraft suddenly made a hard right move along the yawaxis. I tried turning on AP with LNAV and RNAV but the aircraft only flew inn circles not following the flightplan.I'm affraid I got to do yet another re-install... I guess the guys at PMDG are getting rather tired of getting e-mails from me asking to reset my instalations.