From what you described in your last post, I think it's very possible that impulse noise is causing you problems for WCPO-DT -- Interference from Impulse noise is generally more of a factor for VHF than UHF, and more of an issue the weaker a signal actually is. Among other things, It can be caused by such things as a ignition system from a vehicle driving fairly near your antenna, appliances shutting off and on in your house, even an overhead fan that is on or "nearby" the A/C circut your receiver or preamp uses.
Lightning is the only natural source of impulse noise I can think of, and since I most likely get a stronger signal from WCPO-DT here, a very close by lightning strike is the only thing that causes the "blocky "green" noise" (that doesn't necessarily cause a complete dropout) to WCPO-DT -- In fact, it's only happened 1 time that I've noticed, and the lightning strike that caused it was way too close to my house for comfort!
Concerning WHIO-DT, I have no doubt that the problems you guys are seeing are most likely originating at the station, but the problem I have with contacting them about it at this time is that I'm not seeing any problems currently except the "too much" compression issue during SEC football and "it's all here" promo.
I certianly didn't expect, nor did I have any desire to be a HDTV pioneer(i.e. "geek") ... I suppose it was kinda dumb for me to think so, but I thought that we were 1/2 way through the transistion, and that I would always see HD from local stations when available, as well as the same general level of service from the digital stations that is provided via analogs!
... It really hasn't been "that bad" though in our area, but it could certianly be much better! I never thought that being a DTV viewer would require "work"(Contacting the stations, etc) - In a way, it's kinda fun, and I certianly don't mind when the "work" does, or at least "seems to" do some good(as in: when the station actually listens to us) ... But, it does get old. Especially when your counting on HD for such and such programming to show invited guests/etc.
I'm afraid I agree your wife on the dropout issue however, I wouldn't be able to stand that even once a day, let alone once per minute! Luckily, the only problem with dropouts I've really had was when I was seeing the every 10 minute stoppwatchable variety from WHIO-DT.
Update: I forgot to mention, an attic can be an especially bad location where picking up impulse noise off antenna is concerned, especially if there is A/C wiring for your house in the attic. Unfortunetly, a preamp will most likely make things worse if interference from impulse noise is a problem.
Also, again, keep in mind the meters on our receivers tell us virtually NOTHING about actual signal strength. In the best of circmustances, an attic installation will cut actual signal strength 25-50% from what would be achieved via a rooftop antenna. Search AVS hardware area+local reception info area for "impulse noise" and/or attic for more info.