I recently used Mediamonkey to read my MP3 files. I noticed that there are files with comments although I removed all tags with MP3Tag. That's probably because the tag in the file is probably not a MP3 conform tag? I tried all options (read/write tags), nothing helped. Opening the file with a text editor still shows the entries at the end of the file.
Removing the tag with Mediamonkey works and the comments are deleted...
Not sure to consider it a bug if it's probably not an valid MP3 tag (although recognized by other tools)...
The file has multiple ID3v1 tags separated by garbage at the end of the file. I suggest checking and fixing the files with, e.g., MP3 Diags first in case something seems suspicious:
Thanks for the links, didn't know these tools. All files with a broken ID had the same garbage in the file, maybe a corrupted ID tag tool (all mp3s which where affected were old one)....