Mission Planner just updated to 1.3.1. Arducopter was already at 3.1.3. Although setting Hybrid as one of the available flight modes in MP when invoking it via the TX nothing registers in MP.
Evidently not a valid flight mode to set, it seems a bit bizarre/dangerous (maybe) to have it settable
Has anyone actually tried flying with it in 1.3.1 - I'm wondering what the APM does. Perhaps it simply stays in Stabilize mode?
Scary - I'm setting it back to something else.