I'm unhappy whed don't know which tag version is used in the MP3 file. What about using different colors for tag versions in the main tab? For example Black for v1&2, blue for v1 only, brown for v2 only and red for mismatch between v1 and v2.
And also improving of the tab File Properties (I don't know exact name cause I use Czech language) to show v1 and v2 separately would be good for me. FYI: I have upgraded to MP3tag from unsupported File Sorting Utility 1.25 which shows both ID3tag versions separately.
But MP3Tag is great piece of software and after I tried it I stopped looking for other tagger softwares.