Your recommendation worked (Thanks!). In an odd twist, the titantv.com guide typically based it's guide on Ashland (Or.) Fiber Network. With that in mind I used 97520 and the DVR+ guide came up with all correct channel origins but only one week (2/28) on most channels. The bad apple is KTVL (CBS) the old (ROVI) TV Guide source for the DTV Pal DVR (3 in operation with a few new caps) which only had the mandated 12 hour courtesy guide.The only thing left to try is a different Zip code in your area. That actually did work for me, although I still have no idea why the original Zip code stopped working.