I called on Monday and after being transferred twice (and dropped once), I finally got a hold of somebody that said that it had been shipped, and it *was* overnighted, but it was picked up late in the day on Monday so I didn't get it until today. Of course, our stupid pathetic excuse for sunlight this time of year wasn't fading my PROBLEM unit today (we had some high clouds and I didn't get to try it until late afternoon). I tried to induce fade with a bright lamp and got my problem unit to fade just a bit. The best test I found for subtle fade was to rubber band a folded index card to one corner of the stock "baby" picture, page change repeatedly, then see if there was a clear rectangular area in the image that was darker. There was for my problem unit. I can imagine up a very faint line of demarcation on the new unit, but it's pretty darn faint. DH can't see it at all, but he says he thinks he's only making up the one on the faulty unit which is clear as day to me.
He thought I was imagining another line once upon a time--THAT line turns six next month
.
Tomorrow is supposed to be sunnier here, no high clouds. I'll take both units to work with me and check 'em out.