Quite possibly as a result of getting the next track number. It's easy to use math ($t=$t+1) instead of the increment operator ($t++) causing the leading zeroes to be removed. Example:

$ perl -e 'my $t="00";print ++$t'
01
$ perl -e 'my $t="00";print $t+1'
1

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...roboticus

In reply to Re^2: MP3::Tag - Leading zeros on 'track' truncated by roboticus
in thread MP3::Tag - Leading zeros on 'track' truncated by initself

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