I've used mp3tag for 5 years ago, and I've never happened this. When a read a mp3 file, the tag file says IDE3v1, IDEv2.3, APE, but the title, artist, track, album fields appear empty. I try filling the fields again, but it doesn't appear. The only solution is to unistall and reinstall the program, and it works fine, but the problem persist. How can I resolve this??? thanks!!!