How do we keep an eye on old versions of Drupal? What's the policy on this, if any?

I'm asking this because I posted a patch for 4.6.9 (http://drupal.org/node/21568) which I believe it would have been nice to have on 4.6.10, just released. It might not be ready to apply (I believe it is) but then someone had had to change it's state. By the way, this is the only one critical bug for 4.6.9 (I believe it is critical because it can brake your site in some cases - http://drupal.org/node/39710)

I know all our efforts are concentrated on drupal 5.0 but I guess there are many people out there using old versions (and many clients of us). I'm not criticising any one suposed to do this job, don't get me wrong. I just want to know if there is any policy and, if possible, how can we improve it. I might volunteer to do a regular search on critical bugs for old versions (actually that's easy with a feed) , revise them, and let whoever is in charge know about them _before_ any new minor release.


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Robert Garrigós