That might be true for the microphone or the call-function.
But listening to music to my knowledge should work with those headphones on each and every device with a 3.5 mm headphone plug, as the audio-contacts are the same with every headphone. Or am I missing something?
My guess is, that it is simply the problem, that existed with the FP2 from the beginning.
Some headphones seemed to get no contact, because the cover of the FP2 is to thick, so the plug can not be put in firmly enough. Maybe the plugs of some headphones are shaped a bit different (longer, shorter, slimmer …).