[mlin]

Not sure if you are still having the issue with the earpiece and the mic, but I offer this anecdote: A few days ago I thought that my mic and earpiece had gone out as shortly after using my Pre as an MP3 player. Turns out that when I removed the headphones, the prongs inside the headphone jack did not fully release so it registered that the headphones were still plugged in, though to me it just seemed like the mic and earpiece had failed. After rapidly sliding the headphones in and out of the jack, it loosened the mechanism and I no longer have this problem when disconnecting the headphones.