Have just updated the firmware on my WDTV live and all network shares have gone, connot relink with workgroup by medis srever software (serviio) work fine. can link and communicate with WDTV live box through the newtwork but cannot get network share to work?
Did you try resetting it after the firmware update? If this does not fix it you may try rolling back to the previous firmware and redo the update.
Try power cycling the wdtv. Remove it from the power for 5 minutes, then plug it back in.