Well, if the epub pics look like the second attached screen-shot "SonyReader test 16color png" then I will probably have to change my illustrations to 256 shades of gray. That would imply that Sony devices can't handle 16-shade pngs properly.
If the epub looks more like the ADE screen shots, then I can assume that it is the ReaderSoftware that has a rendering bug, and press on with my 16-shade pngs.
Thanks for checking for me.
Last edited by GrannyGrump; 09-20-2013 at 02:49 AM.