I upgraded one Roamio Pro and one first gen Mini yesterday through forced downloads and all the problems described...endlessly looping Minis, black screens, cablecard errors on the Mini, etc. I let our other Roamio and all the Minis upgrade on their own overnight and this morning, everything is working fine. Watched live TV for several hours this morning through a couple of different Minis without issues. Playback across DVRs worked fine, as did streaming from Netflix and Hulu last night on the upgraded Roamio Pro. For anyone still have issues with their Mini/DVR connections, I'd suggest doing a forced connection, and then rebooting the DVR(s). Then do the same on each Mini.I have too have the v66 error on 3 Minis and also on my Roamio Plus with Verizon FIOS. A reboot fixes it, but it's only temporary. So basically all of my TVs do not have Live TV without a reboot and the "fix" times out. I'm hoping we have an answer today on this. I'm ok with quirks of a new release, but no Live TV on every box is going to be a tough sell to my wife. She's already struggling with the new UI.