Naro discovered a critical bug of PTS 1.2.2 (included in Plone 2.1.1)
which basically was missing migrations, resulting in brokeness of all
I have updated the already existing migration mechanism of PTS and
released a PTS 1.2.3 which fixes this problem. The fix is actually a one
liner, so I'll let some else decide if this justifies a new/revised
Plone release or only an entry in the ErrorReferences of plone.org.