Well, I didn't change a thing, just opened and saved the file. I just did it again to be sure and every time the file was saved there was a loss of the number of "unique" colors and the file size changed:
http://home.earthlink.net/~pdml-pics/jpgloss.jpg Shel > [Original Message] > From: Rob Studdert > I have no doubt about the validity of your observations however if a jpg image > hasn't been transformed in any way it should be saved without loss of > colour/detail. A transformation could also take the form of rendering an image > to an alternate colour space.
