I am not certain of what is causing this, but... Last night I upgraded my Fedora 14 kernel package from (2.6.35.10-74.fc14.x86_64) to (2.6.35.11-83.fc14.x86_64) and all my pvrusb2 (HVR-1950) recordings failed on MythTV. I rebooted to the earlier kernel and it is working again. Did the driver change in the kernel and did something get broken?