Just hooked up a DisplayTech 64128G (same display as used on the DB101, except this one has no RGB backlight, just white).
It has annoying vertical stripes of reduced 'brightness' when viewed from the side; it's ok when looked at straight on. Seems some kind of capacitive crosstalk/regulation/too weak drivers problem areas that are bigger than a single pixel.
Definitely not a defective glass, the annoying columns simply shift along when the picture is moved horizontally.
I guess not much can be done about it except not using big black area's :(
It seems cheapness comes with a price :)