"I bet the compass mounted on the arm may be an issue. I don't know how close it is but your motors are made of magnets and the interference may even change as the motors have different levels of power. I don't know about checking logs for compass…"

"Please"

"So it doesn't matter which direction the quad is facing and it always drifts east?  On the mission planner Flight Data screen, does it show correct headings as you turn it?  I'm thinking maybe magnetic/metal interference from something near the…"

"Andre, you're awesome! Thanks for the time and help here. Yes, I did not even know that I could switch the APM out of RTL mode once it activated. I also didn't know that the geo-fence was using the barometric altitide. I guess I assumed it would use…"

"Ok, sorry, I see what you mean.  I attached a photo of my errors and graphed altitude.  Also, you'll see that the quad went into RTL mode by itself.  I never placed it into RTL but I did activate the alt-hold just to see if it would stop the climb. …"

"Andre, thanks for looking. Yeah, I didn't think it was vibration related since the barometer was showing the correct altitude. Did you see the big red GPS and fence errors in the log?
It looks like I had 8-9 SATs locked but maybe it thought I was in…"

"jg, I believe I'm having the same issue you had(http://diydrones.com/forum/topics/crash-out-of-nowhere), but I'm not completely sure.  As soon as I armed the quad in stabilize, it shot straight up into the sky and crashed down on my roof.  But…"

"Ben,
Thanks so much for your post here.  I was constantly wobbling on takeoff and crashing my new homebuilt quad and tried everything from firmware changes to CG changes to electrical.  I followed every single step in the troubleshooting page…"

"Also, I used the Bixler standard config file created by Chris Anderson so I don't think it's the PID settings, but it could be.  Could anyone please take a look and offer some help?"