Upgrading to new version.
I should probably mention first that I'm not an Ubuntu user - my gf is.
All the recent talk about Drake has reminded me of a question I never got around to asking when she upgraded from Hoary to Breezy. Basically, I was surprised when the upgrade seemed to call for (re)installing every package installed - even though the version numbers were usually the same.
Most distros I've used, regularly updating your installed packagesis effectively upgrading to the new version bit-by-bit. Is this not the case in Ubuntu, or did my gf make some sort of mistake in the upgrade process?