The trend in tagging is towards merging tags and tag synonyms, so I imagine this will be quite contentious.

Given the different default behaviours and configurations of different Ubuntu releases (6.06 vs. 8.04 vs. 10.04, and everything in between), would it be worth splitting the generic ubuntu tag into different tags by distribution (e.g. ubuntu-10.04 and ubuntu-8.04 already exist) and eliminating the "blanket" tag? Should the same be done for any OS or other piece of software where the behaviour can radically change between versions (e.g. windows)?