Anyone else with a Verizon Tuna having problems with the other person hearing you during calls? Frequently after some random period of time the person on the other end of the line will say they can't hear me, and I have to hang up and call them back to fix it. I thought it was because my signal is awful at home, but it happened over the weekend when I had 4 bars a couple times too.
Are you accidentally hitting the mute button with your face? My girlfriend used to do that all the time with her Droid 1.