All - I'm having problems with MAC filtering on my wireless network. I have a TiVo series 2 connected by 802.11b and it has worked fine for months. I've activated MAC filtering on my router (and even cloned the MAC address for the TiVo that showed up in the access log). With MAC filtering on, the TiVo screen displays (none) for signal strength. I've triple checked the MAC address on the TiVo and the wireless adapter. When I disable MAC filtering, the TiVo recovers the connection. With MAC filtering, it immediately drops it, even after restart. My laptop connects perfectly when MAC is turned on. Any ideas? Thanks!