The lsb package was already using python-central in jaunty, so I think this only affected users of intermediate karmic versions; I did a jaunty -> karmic upgrade (debootstrap jaunty + apt-get install update-manager-core (pulls python-support for some reason) + do-release-upgrade) and there's no /usr/lib/pymodules/python2.6/lsb-release.py and update-python-modules --post-install doesn't trigger the warning.
The lsb package was already using python-central in jaunty, so I think this only affected users of intermediate karmic versions; I did a jaunty -> karmic upgrade (debootstrap jaunty + apt-get install update-manager-core (pulls python-support for some reason) + do-release-upgrade) and there's no /usr/lib/ pymodules/ python2. 6/lsb-release. py and update- python- modules --post-install doesn't trigger the warning.