They're using the Google Closure compiler as their minifier now.<p>Resig in this presentation (warning: video autoplay), in response to the last question, said that while it's slick if you simply throw jquery into it you'll just get broken javascript out: <a href="http://developer.yahoo.com/yui/theater/video.php?v=resig-testing" rel="nofollow">http://developer.yahoo.com/yui/theater/video.php?v=resig-tes...</a>
I wonder what has changed?<p>(Maybe just not running it in advanced mode; at any rate, they're reporting a 13% decrease in file size: <a href="http://github.com/jquery/jquery/commit/3fd62eae9df3159fc238a515bb748140a942313d" rel="nofollow">http://github.com/jquery/jquery/commit/3fd62eae9df3159fc238a...</a>)