Ok, great news on the headend info. I've been fighting it for over a week now and at least in my case the Tivo isn't groking the new FSID for UKTV or the addition of NoNag. So it's very helpful to know that the headend at least is kosher. Now I just need to figure out the method for telling the things there's a lineup change and we should be golden (and by we I mean those of us who have been on the emulator prior to last week or so).

As for timezone, IIRC the proper setting is 0, as far as the machines are concerned we're all GMT. Regardless, if you're up and running ok, I'd go with the ain't broke don't fix it mentality...