Id3 tags not recognized should be shown because they may contain valuable informations.
I remember foobar2000 was able to shown them in "raw mode":
http://img5.imageshack.us/img5/3531/38865785xz6.jpg
http://img3.imageshack.us/img3/5024/tag ... v22ev2.png
http://i290.photobucket.com/albums/ll27 ... bartag.png