I dislike it when a leading zero appears in the track number of the track tag (or when the total track count is added after a '/' char).
[Aside: It seems like a bad idea to pollute a nice simple tag like the track with extra information like this. My intuition is that the information in each tag should be kept as simple and pure as possible. In databases there is a similar concept: you usually want to achieve what is called a normalized design. But if someone has a good reason for doing otherwise, please educate me!
Note that I only have a problem with leading zeroes in the track TAGS. In contrast, when I use tracks in filenames, I DO like a leading zero if there are > 9 tracks on the CD because that causes the filenames to be lexicographically ordered, which is critical for proper sorting by your file system, as well as it visually looks better when filenames are displayed in a list.]
Earlier in this thread, phoenixdarkdirk pointed out how to remove any '/' char and following digits.
Here is how to remove any leading zeroes (as well as trimmable whitespace):