I know about this problem with iPods, because it happens to me. The right earphone always goes out first. It starts with a little crackling, then it seems as the volume is lower on that side, then it's gone completely. They have huge threads about this on iPod forums, but it seems to me that it's happening with my PSP as well. Most of the earphones i use on my PSP (i keep psp and ipod earphones seperate) are becoming retarded on my right side. Anyone else have this happen to them?