I would like to chime in here also - about 3 months ago, after running practically flawlessly since December 2010, my Ceton started having most of the issues in this thread - partial recordings, stopped for use by another component, no tuners available, etc. And I also agree that 18.104.22.168 has made my system once again pretty reliable - when before I had a partial/missed recording or more EVERY NIGHT, I now have gotten every recording since March 6th (right after I updated to this latest beta FW). I have had my Ceton replaced twice, so it wasn't the tuner card. My guess, and it is ONLY my guess, is Ceton, while trying to correct other issues, introduced some major bugs in the FW - how else could a system that has worked flawlessly since I got my card sometime in December 2011 go totally south? To their credit, they have worked tirelessly with me for the last 3 months, and I can't but believe all the hundreds of diagnostics that were sent in by everyone helped them at least narrow down the cause of the issues. Now some have said that they have made changes to the FW to mask the real problem - card reboots due to either the FW itself or some MS process, but I don't have the expertise to analyze the log files to determine if this is the case or not - all I know is my wife isn't bitching at me constantly! And I'm not bitching at her!
I'm almost to the point I feel safe returning that atrocious RNG-200N DVR from Comcast that I had to get so I could at least manage to watch some of the shows that were missed - gawd - I would rather rip my tongue out with a pair of pliers than have to use that for all my recordings!
Again kudos to Ceton for working their tails off to solidify this product!
Now if Comcast Houston could get their act together and fix the Subscription Required messages that pepper every premium show, that would be heaven!