Hi
The 3.4.x branch is development / testing / cooking branch for early adopters
and people that like to have advanced functionality early and are quite happy
with occasional instabilities and frequent re-installs.
The 3.2.x is the stable branch for corporate users and people that want to be
able to stick with a particular version for a year before needing to
re-install.
Many OpenSource projects use this tactic in order to cover the 2 opposite needs
of very different users. It helps deal with the problems in the "Release early
and release often" model as described in the "Cathedral and Bazaar"
http://en.wikipedia.org/wiki/The_Cathedral_and_the_Bazaar
Regards from
Tom