Using the Plantronics Voyager Pro HD headset and finding that with the 7.5.3 firmware the phone thinks its connected to the headset but does not transmit audio. Rebooting the phone corrects this or power cycling the headset.
Prior to 7.5.3 was running 7.4.6 firmware with no issues.
Are you using the -bt version of the firmware?
Yes, by default we always load the -bt firmware to ensure that all devices are consistent in their bluetooth firmware.