User blog comment:DaNASCAT/Technical Update: August 23, 2011/@comment-8-20110824172538

I've just added in an update about watchlist emails. We're going to try changing the watchlist logic on Community Central, so if you miss a mail you still get told of future edits (one per 24 hours max). Please let us know how this works for you.

(edit: tried to clarify further)