Adding a "me too" post.
I have a Tivo 80 hr Sony unit. It was perfect on the network until 7.1/7.1a. I use the green checked Belkin F5D5050 USB to 100 Mbps ethernet adapter. That plugs in to a Linksys Game adapter via a crossover cable. The game adapter functions as a wireless ethernet bridge. WiFi is provided to the premises via a Belkin wirelese router/AP configured as an AP.
It might sound complicated, but it worked great until I requested and received the 7.1 software from Tivo. Don't get me wrong, I love the speediness program guide now (that's why I requested the update).
My Tivo drops off the network after about 24 hours (it may actually be less, but I check about once a day.) A reboot fixes it, but 24 hours later, the Tivo off the network again. Daily reboots aren't a long term fix. My Tivo is on a UPS and never needed reboots before.
For me, the easiest way to test whether the Tivo is on the network or not is to access Music and Photos. If "New Music from BestBuy" is in the list, networking is okay. If not, the Tivo does not see the network. When Tivo is not on the network, it doesn't get guide data updates.
I've tried both static IP address and network settings and also supplying the information from a DHCP server on my network. The result is the same in both cases, Tivo drops off the network within 24 hours of a reboot.
Tivo run's Linux, maybe they need to update the USB kernel module or something else related to the USB network module. I doubt Tivo is actually dropping it's IP configuration, probably just dropping support for USB after a period of time.
Is there any way I can help troubleshoot this or any other source of information I should check out?
Thanks!!
Brian