Sorry for the delay in response! ^^;
Fair enough; but even without a new build, could 1.0.4 not be included in the more recent packages?
Otherwise, perhaps it might be worth mentioning on the Ubuntu runtime download page which package is the most recent that contains the runtime, simply in order to save users from hunting through packages looking for it. At the moment I believe that it indicates for the user to use whichever version of Ubuntu they are using.