First a little background.
Ive been using ardupilot for a while now. I had the original working well, and had flights out to 9km with great success. But then I updated the software and had to start all over. No problem I thought, a good excuse to move to the mega platform.
I now have the ardupilot mega/oilpan and ublox GPS in a skywalker currently with the latest code.
My problem is that although the plane flys fine in stabilize and FBW, as soon as I try auto it tries to destroy itself. It goes full throttle and drops the nose. Things get ugly very quick as you could imagine. Also it doesn't appear to even turn towards the way point.
The GPS seems to work OK, as it reports my current position correctly in google earth, and I can upload waypoints, and check them.
I must be missing something obvious, but not to me right now. If I had to guess I would say a faulty GPS, but as mentioned it appears to work fine.
Any ideas on where I should start looking? I'm a little lost.