Well I guess a bad soulder connection can happen to anyone. Nice to have the three year warranty. I've been doing a little research on third party cables for another IEM and have been very surprised by the high failure rates people have mentioned. I've never had a cable problem with a IEM, only the well known connection issue with the Senn 580.
Yes, Swawn71 was right is his interpretation; I just copied the distributor's email text in bold. We're in Hong Kong here so english can be a bit uneven -mine included-.
My phones had no visible damage, both times. The jack and the spring as well as everything else looked new. The issue was with the little wires that connect from inside to the jack pin terminal, some of those were pulled and disconnected. Both times right channel dropped. My guess is that placing the phone inside pockets with the headphones plugged and then retrieving the phone repeatedly caused the cable to pull beyond "natural range of motion" one too many times.