No cableproblems so far (I only own them for 2 weeks).
Strange thing happened, when I received them they were fine, after an hour on headphone sounded muffled and soft, no matter what I tried, nothing helped; switched ears, source, cable-sides, treble- and bassports, one earpiece gave almost no sound. The next day I was ready to return them, packed them in, decided to have one more try, and no problems at all!
I love the sound, the sound so much better then my Shure E4s, but the fragility makes me nervous.
Good thing the cable is replacable but I think the treble- and bassports are potential sources of trouble, and since I find all ports except for the flat(=) ones distorting, with hindsight I would have preferred them fixed.