"I can confirm this behavior with 2.0.47. As soon as it is switched to alt hold mode, it spins on itself, and the altitude varies far more than in stabilize mode with a fair amount of throttle."

"Hello to all of you,

I am also in Montreal (Plateau). A friend and I have just started working on our first quadcopter using APM. This should be an interesting project. We've also dropped by Foulab a few times, very nice people and space, maybe…"