I had been having problems with the reliablity of the Media Center Extender connection to the Media Center PC, from our bedroom. Often, playback would pause, and I would have to reconnect to the PC. This continued to happen even after switching to the Xbox.
I decide to reorganize my home network, to try and improve things. I switched things around so all of the media related devices are on the same Gigabit ethernet switch. Hopefully, this will help prevent bandwidth contention, when attempting to watch television or movies.
Next time I climb up to the attic, I need to label each of the ethernet cables, so I can know which room and port each go to. Currently, it takes me a few tries to determine what is connected to each.