Just wanted to let the forum community know that I may have encountered a possible generic (I would call minor) flaw with the new 60" Sony LED line of TVs. I recently bought a new KDL60EX645 and discovered that it exhibited a small "dark area" angling up diagonally out of both the left and right lower corners of the screen, otherwise the set was very good. The dark spots are barely noticeable during "normal" viewing with varied colored background/images, but are easily spotted against a white, yellow, light blue, light grey, etc screen. It's almost like the opposite of flash-lighting. It almost seems like a shadow or smudge trapped underneath the outer screen.
Anyway, I decided to exchange it for another unit, and was able to swap to a different tv with a serial number separated by over 9000 and built about two months apart. The replacement set has the EXACT same shadow/dark spots in the same locations. I can now say that this model Sony has a generic flaw, or I just happen to be a victim of quite a coincidence.
I just wanted to get this info out, so that anyone else considering this particular model can have a "heads-up". I would welcome anyone else to share their experience if the too own or purchase this model. I would also welcome any opinion as to what may be the cause of this condition. The dark spots are present on every input and present with or without a signal. No picture adjustments affect them either, but the backlight and contrast will "interact" so to speak with the dark spots, altering their prominence slightly, but it's just masking the effect not actually changing anything.
At this point I will likely keep the set, because besides for this issue everything else is quite good. No significant/noticible banding or DSE, no flash-lighting or clouds, good picture quality, etc.
Thanks for listening!