Please add a user preference to enable/disable the postedit confirmation ("Your edit was saved") dialog.
Right now, a savvy user can disable it with CSS in Special:MyPage/vector.css, but a preferences checkbox would be easier for a wide audience.
Why disable it? Because it blocks other UI elements for the three seconds that it appears. I'm constantly having to pause and wait, or click to dismiss, so I can get at a link underneath it. It's an extra click or delay that adds no value for advanced users. (Though I'm sure it helps beginners.)