Sure, but I'm worried about the guy who decides that his decoder will use ISO-8859-1 by default, or UTF-16 if that's specified in some meta-metadata chunk somew

Sure, but I'm worried about the guy who decides that his decoder will use ISO-8859-1 by default, or UTF-16 if that's specified in some meta-metadata chunk somewhere. If this were written down in a spec, we wouldn't have to fret about it.