One for you technical bods. I know what tags DO, just not where they're stored in the file or how they work. I'm sure I've heard that different types of tags (i.e, earlier and later versions) can co-exist on MP3s etc. Is this true, and if so, does it add bits to the overall file size? Also, what happens to tags - multiple versions on a single track or not - when you convert them to ATRAC3Plus? Do they get rewritten in some format of Sony's own devising, or does ATRAC3Plus also use the same tags? And, if this is so, what happens to any used tags living on an MP3 track after it's been converted? Sorry for so many questions. I'm just really curious to expand my knowledge.