Only one minor quibble, Dch48: Unlike the distribution3 page, that page does require Flash to be active in order to check version (in current browser) and update, plus it requires separate visits in respective browsers to update both Active-X and plugin versions. For my money, that actually increases the number of places I need Flash online, which is contrary to my intended purpose.
Unfortunately there are still too many sites that insist on Flash even if you're fully HTML5-compatible.