Well, you are the first one who complains about stuck pixels on eInk.
I do not see pixels and definitely have no stuck ones, because the latter refers to LCD panels. I also don't have any permanent black dots, probably you have a defective unit. When I just upgraded from 500 to 505, I noticed that although 505 screen is so much better, it looked liked as if someone spilled black sand all over white sheet. This visual illusion disappeared in about 2-3 months.
