I seem to be having an issue with M5 where mid way through calls the person on the other end just can't hear me. I can hear them fine. I can punch in buttons on the dial pad and they hear it but they can't hear my voice. After searching i found a bunch of people having this problem back in January. I also have noticed that this happens on some of the newer kernels too.
This is just base M5 nothing changed.
Verizon Galaxy Nexus (CM10 Nightly)
(Retired) Sprint Nexus S 4G
(Retired) Verizon Motorola Droid
(Retired) At&t Apple iPhone 3G
Galaxy Tab 10.1 IO Edition
(Retired) Nook Color