Embedded tweets are now fully visible when you post a comment or show new comments - instead of having to reload the page. Example.
I guess @Lizardoid doesn’t want to publicly apologize for what he did to Dan Rather on behalf of the crazy, racist wingnuts he now hates.— ‘Jim’ ‘Treacher’ (@jtLOL) April 24, 2012
(Reload the page to get the latest Javascript.)