I've just bought a pair of RE0s for traveling. Today I tried to connect the RE0s to my laptop, and to my surprise I started hearing (and, with the small tips, feeling!) electrical sparks in my left ear canal. They would stop as soon as I moved the tip inside the ear, and occasionally start again when I move my head around. Mostly an annoyance, but the fact that I only feel the sparks from the L speaker (I tried to switch ears, and the sparks always come from the L speaker), make me fear that the L speaker is defective. Has anybody else had the same issue? What did you do about it?