Rachel sprite graphic bug??

The missing pixels are by her shoulder, but there's also a transparent pixel by her skirt. The ones at her shoulder definitely look like a mistake to me. It looks to me like they're supposed to black (the same color as her outline). The devs probably missed it by looking at her on top of a black background, or something.

The pixel missing on her skirt seems to be a space between her hair an the skirt and it is surrounded by black ones which makes things look more natural to me than the ones by her shoulder. You explanation about being black pixels does make sense and the sprite look good this way after a test. I'll go with the black option rather than improvising myself as a one-day spriter.