Just for the sake of thoroughness...

After the re-program, my screen has still done this twice on mornings after a night in the garage so it's not the temperature. At one point before I had brought it in, it had been dark for 2 weeks straight, even after restarts... and it magically started working again a few days before I brought it in so my dealer never saw it fail. I told him about it via email when it happened again and he hasn't responded. I guess I'll have to break out the camcorder hoping to catch this again. I'd like a new screen for sure. Seems like a bad batch. The other thread mentioned a bulb though... dunno.

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'08 X5 3.0si - Alpine White / Saddle Brown interior
Specs: Sport Pkg, Premium Pkg, Tech Pkg, Comfort Access, Aero Kit, Style 433 staggered 20s on Conti DWS
Mods: Carbon 35 tint, LED angel eyes, GP Thunder 7500k fogs, H&R 20mm/25mm spacers, clear reflectors, gunsmoke-tinted taillights
Coded: Digital speedo, windows/sunroof/tailgate close via keyfob

X5 pics at Flickr