We're quoting Mitch:
My girlfriend has received her iPhone 3G last week and the charger did not work. She's got it exchanged at the store.
Yesterday evening, my charger stopped working too, after 3 months. Obviously, there are more people with broken chargers, so a question raises: was it pure coincidence, or is there a design/manufacturing error in these new iPhone 3G chargers?
It's clearly too soon to answer that question. When the original iPhone was released, there were some cases of dying chargers, but it never became epidemic.
[translation by xavier]