Dear Mr. Heidenreich!
I hope that you won't find this as nagging or pleading, but now that I have been using MP3tag more or less constantly for about 5 years I will allow myself to request one little feature that (after forum search) I can see has not been too hardly requested before. I'm working quite a lot with discographies and as such there are very often the need to apply changes to all titles in an album, i.e. cover art. I would very much like to see the possibility to collapse the listview on the album (or any other) field, greying out all the items in the tag panel that concerns individual files, so that I can apply changes to all files in an album. My collection is very strictly organized as:
(artists name first letter)\artist\year - album\titles.mp3. Hopefully you'll see right away that this organization cries for the above mentioned option.
I convert and store all my work as best possible MP3 quality (320 if possible) and i strive to find all my coverart as 500x500 dpi images.
This is one of my christmas wishes.