Normand,

What you said actually makes sense now. I think it wasn't until the 4th or 5th generation iPod that Apple finally standarized their "dock" connector. So a 5th generation iPod charger would charge a 3rd generation iPod touch (and vice versa), but a 3rd generation charger has a different pin out than the newer dock connector used in new iPods, iPhones, iPod Touch, and iPad.

Brian