Failed Ethernet connectivity

Silvertwinkie 

I jump around with the Ultra 4660 between wired and different wifi/wireless networks (different routers).  Sometimes, it does not see the wired connection (unavailable) when I switch back to it.  Normally, a few repeated System Restarts will get it to finally see the wired connection again.  If it doesn't after three or four, I just keep it on the wireless connection of the Wired network and eventually it will make its way back over there. (if you are on a wireless connection and Restart the Roku device, it will/should switch to the Wired connection by default).

I don't think it is your router, the ethernet cable, or even defective hardware of the Ultra.  I think it is just a software/firmware gremlin that loses connection and has trouble reestablishing/detecting the available wired connection.

You can certainly try unplugging both the Roku device and the router for a couple of minutes. (allow 5 minutes to allow discharge if you can) and then boot back up. If no luck, try leaving the Roku device unplugged when you go to sleep and then test again in the morning.  This should give ample time for it to reset itself.  If still a no-go, I would now Factory Reset the Roku device (press and hold reset button for 30+seconds), especially now that it has undergone its update.  Just make sure you have a working physical Roku remote before performing a Factory Reset on a Roku device/RokuTV.