Most of the images I use at eBay are scans and I've noticed -- with other people's listings as well -- that dark, solid colors come out looking muddy and horrible (red being the biggest problem).
Solid, dark colors are the only ones I have trouble with. The images are fine on my end and the supersized versions are fine at eBay. It's just the reductions that look terrible.
Why is this? And is there anything I can do about it?