Wow, Pioneer is awesome. I'm not being sarcastic. The unit may have a problem, still, but today I got a
callback from Pioneer DVR support checking on my trouble ticket from 6 weeks ago. Alas I had to tell him that it's still not working for me -- right now I'm heading for 4 weeks with no EPG. Scheduled recordings are still working (as described above by myself and others) so I'm not really jumping up and down screaming. It's just that it would be nice to program new shows, navigate the EPG, etc.

I mentioned to the guy that there was a whole community of folks here (at avsforums) with this same "disappearing EPG" problem, and he was very interested in that. I gave him directions to here and he might come by and take a look to see the trouble reports. Everyone be on your best behavior

And remember, this thread is about the disappearing EPG -- you've got it, it works, and then it disappears and says it'll be back in 24 hours. But takes days if not a week or more to come back. I'm just saying, let's keep the problems sequestered

Thanks everyone.
Fortunately I'm a good test case, because I'm strictly over the air. No cable, no satellite, no IR blaster, just 9 channels of OTA fun! So it can't be blamed on CableMegaCorpInc and whether they're passing the VBI data or not.