I just remembered the other thing I did to my Incredible before the screens stopped flipping -- after having read that thread about how the capacitive touch screen doesn't work when the phone is sitting on blankets, Styrofoam, in card docks, etc., I tested my phone on whatever I could find: boxes, bubble wrap, blankets, my sofa, carpeting.
If, in fact, my flipping screen issue is resolved somehow, I wonder if exposure to some of those materials altered something? Doubt it, but...?
[My screen failed to register on the bubble wrap & sofa, jic it matters.]