MM> change a lot, still ugly artifacts and over sharpness. The artefacts look a MM> bit like maximum JPG compressed but with a violet tint on larger uniform MM> areas an the black and white photos?
Hmm, that does remind me of how overly compressed jpeg might look like. As you sent uncompressed JPEGs, they might have been too large for their system and they recompressed them behind your back ? Dunno. Best regards, Frantisek Vlcek