It stutters and skips because the wireless connection is not at peak efficiency.. or too far from each other. Or any interference can cause this as well such as a microwave. Found this out myself while heating popcorn during a movie. )
Not sure which wireless Hub Bell provided, the quality the wireless functions isn't that great on some of them, however neither are the wireless functions of the WDTV Live. If you can use a Ethernet cable between your WDTV and the rest of your network.