gif is lossless for images with < 256 colors and good for sharp-edged art according to this. http://ist.uwaterloo.ca/~anderson/images/GIFvsJPEG/compression_rat

gif is lossless for images with < 256 colors and good for sharp-edged art according to this. http://ist.uwaterloo.ca/~anderson/images/GIFvsJPEG/compression_rates.html http://ist.uwaterloo.ca/~anderson/images/GIFvsJPEG/compressi... That would be my guess.