After much interpretation of the 'wink and nod' and fandance maneuvers used to communicate information between directv and its customers, it appears that the dvr's on the CE will benefit from putting the receivers in standby mode periodically. Apparently there are some housekeeping functions that will only be performed when in standby or alternatively when the unit cant wait any longer, and with all the extra stuff the new s/w is doing, that can cause some problems to manifest themselves.
I put both units in standby for about 6 hours earlier today and enjoyed blip free MRV for 2 hours this evening, which has never happened before.
I guess its always taken standby mode time to do housekeeping, but until rather recently its been able to do it here and there when the unit was on and there wasnt much of a problem. Now with directv2pc, mrv, dlb, etc, etc...it needs it. This was a big deal for me because I've NEVER put my units in standby.
I also discovered that if you are using MRV bi-directionally (as in the wife downstairs watching something on the upstairs dvr while you're upstairs watching something on the downstairs dvr), and you both delete a show on the other DVR at approximately the same time, both lock up. One went to 'please wait' with a stuck progress meter and the other went to a black screen.
I'd file reports, but directv doesnt read this site so hopefully they find this obscure bug on their own before the s/w goes NR.