[JimSmith94]

My Plantronics 510 also hasn't worked well since upgrading from WM5 to any WM6x version. Now people say it fades in and out and is scratchy sounding, where it used to be clear enough that they couldn't tell I was using a headset.

I'm sort of committed to this headset though, because I also use it with the Plantronics BUA-100 Bluetooth dongle and Cisco Communicator on my work laptop.