I have upgraded my APM 2.5 with 3.1 but have a flight mode issue.
When flying away from me in any flight mode, right is right and left is left.
When I yaw my hex to bring it back right is still right and left is still left - the controls are reversed.
I checked to make sure simple mode was not ticked in flight modes - and it isnt - it was prior to upgrade but not now. I have re-saved parameters and still have the same issue.
@Tom,
If you are using a telemetry radio to record the MavLink data stream from your multicopter, then there will be a tlog file of the flight in the Program Files(x86)/Mission Planner/log/QUADROTOR folder. Here are the Wiki instructions on how to download and analyze them: http://copter.ardupilot.com/wiki/common-mission-planner-telemetry-logs/
Regards,
TCIII GM