I detect a bug regarding tag "comment" in mp3 files. When you edit the tag in mp3tag, the tag will not visible from itunes.
Now if you open mp3 file since itunes the tag "comment" is empy. After, in itunes program, if you edit since itunes the same mp3 file one more time but writting a diferent text, mp3tag read 2 tags with the same name "comment" but with different content. This is visible when you click over tags button.
If you edit m4a (mp4 audio), this problem not appear.
I uploaded two files (same advertisement spot). One file with mp3 with 2 tags "comment" and one file m4a with one tag "comment" (m4a is not a problem).
It is a bug? will be solved?
thank you florian!