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Recent feature changes to Stack Exchange

For example, in If you just witnessed tactical downvoting, is it a reportable offense? Jeff announces that the window for reverting a downvote has been reduced. Larger features will make it to a blog entry but a lot of things like this won't.

Think of it as "living release notes". All it would be is a list of changes by date with short descriptions with links to a short description of the change, possibly with a link to something back here (if relevant) and/or the SO blog (again, if relevant).

It'd be nice to keep track of what's changed (and why).