Not to beat a dead horse here, but...
What works very well for me as Release Maintainer regarding DB version numbers is when the patch to updatedatabase.pl simply uses the format:
3.03.XXX
(which some folks are doing)
and no modification is made to kohaversion.pl
In 99% of cases, this applies cleanly and allows me to follow up with a single patch to adjust the version number in both places.
So I'd love to see everyone adapt this style.
Kind Regards,
Chris