I have been spending several hours tagging my MP3s and on the whole they work, but there about 30 or so tracks which simply won't accept my changes. When I click on the track in MP3tag I can see that the tags have been changed - but in Windows Explorer they don't exist, and the old album, title, etc. are still there. I checked the file properties and they're not 'read only'. The tracks are all normal MP3s. Any help would be greatly appreciated please!