I have been getting compass error since the latest update firmware 1.9.60 in p mode and when I take off it tends to wander on it's own even tho I have 19 sats showing gps. It never done this before this update.
I don't know if this has been posted by anyone but just in case it has not, I thought I would. Here is the link page to what you need to know. Press Release – DOT and FAA Finalize Rules for Small Unmanned Aircraft Systems.