otrs 2 upgrade from Ubuntu 12.04 to 14.04 fails - otrs database upgrade incomplete ?

When doing a 'do-release-upgrade [-d]" from ubuntu 12.04 LTS to 14.04 LTS on a system where otrs2 is installed (from repositories), the upgrade fails due to a failing upgrade of otrs2

AFAICT, the cause of the problem is that the upgrade of otrs2 requires a database upgrade, and otrs expects you to step through all the versions (i.e. ... -> 3.0 -> 3.1 -> 3.2 -> 3.3 ...)

the upgrade scripts that come with the otrs2 packacke on ubuntu 14.04 seem to miss a step. If I'm reading it right, they start from 3.2 so the upgrade step from 3.0 to 3.1 is missed, resulting in all sorts of errors re. missing tablrs and fields in the database.

As a side effect, OTRS is inaccessible, because the session data can no longer be read correctly, and any login attempt is denied with a "Invalid session" error.

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documentation:

12.04: apt-cache policy otrs2
otrs2:
  Installed: 3.0.11+dfsg1-1
  Candidate: 3.0.11+dfsg1-1
  Version table:
 *** 3.0.11+dfsg1-1 0
        500 http://be.archive.ubuntu.com/ubuntu/ precise/universe amd64 Packages
        100 /var/lib/dpkg/status

14.04 :
/usr/share/dbconfig-common/scripts/otrs2/upgrade/mysql# ls
3.2.0 3.2.1 3.3.1

and /usr/share/otrs/scripts#
DBUpdate-to-3.2.pl
DBUpdate-to-3.3.pl
DBUpdate-to-3.3.postgresql_before_8_2.sql
DBUpdate-to-3.3.postgresql.sql
DBUpdate-to-3.3.mssql.sql
DBUpdate-to-3.3.mysql.sql
DBUpdate-to-3.3.oracle.sql

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the whole thing results is a botched OS upgrade with several site effects that require their own specific troubleshooting, things such as apache failing to start due to bad (otrs) config, apt and dpkg producing errors because of broken packages they expect to be fixed before they let you do anything else, etc. So i think this issue deserves some attention.