In the process of trying to figure out why my Droid X microphone stopped working for no apparent reason and after many restarts, reboots & pulling the battery, mic still didn't work. My husband & I figured out it was the bottom plastic piece just under the settings, home, return search buttons. We tested the piece from his Droid on my Droid and microphone worked fine. Temporarily we took the tiny plastic (Mylar) off in center, cleaned the dirt off of it and stuck it back on the bottom plastic piece.
Works okay. Now I need to find a replacement piece for mine, any ideas where I can find the piece.
Thank you
Cathy