Advertisements I've used simultaneous output with DirecTv and Verizon FIOS to feed other devices. Sounds to me like TiVo's customer support is just being lazy. If a s/w change really changed how this works, they should address it. Perhaps HDCP is getting confused? If so, rebooting the TiVo with the HDMI connected TV turned ON may or may not help. Getting one of those HDMI splitters that handles negotiating the HDCP may also help.