today, for the first time in the many years of me using mp3tag, I've worked with an album consisting of m4a files and noticed that no matter what I did, a padded zero would not be accepted.
After some googling I found a thread on this forum stating that the m4a standard does not support padded zeroes.
However, couldn't you just always pad them in the tag field on reading the tags, so tag->filename conversions work properly without annoying trickery?
I always work with padded zeroes, so there's not really any instance at all where I would work with non-padded tracknumbers. Some might, and because of that I'd suggest an opt-in option checkbox that specifies this behavior.
Hope this is not too much to ask for, until then I'll just pad them with Bulk Rename Utility (or by hand if it's just the first 9 files in the album).
Thanks for listening, and thanks for this awesome program,