I thought revisions (the page that appears when you click on the "edited..." link on a post) were for displaying events related to the modifications of a post (changing title/content/tags/...).
But I saw this recently:
Why does the Twitter event appear here? I would understand seeing it in the timeline of the post (and it is, indeed, shown there), but what purpose does it serve to have it in the revisions? This isn't a revision: the post hasn't been modified in any way.