[jackie_w]

Originally Posted by chaley

Thanks. Using these covers I worked out why drag/dropped covers were so full of artifacts. The default compression quality used by Qt when converting from bitmaps to jpg is 75, which is quite low. To test, I changed calibre to use a much higher quality number, and the covers are much better. They still aren't perfect, as apparently something in the image chain is still messing with the pixels, but the artifacts are much harder to see.

Changes submitted to Kovid. He may have a better solution.

Thanks for taking the time