jQuery 1.5.2 is released on 31-Mar-2011. This is the second minor release on top of jQuery 1.5 and lands a number of fixes for bugs.
As usual, we provide two copies of jQuery, one minified and one uncompressed (for debugging or reading).
You can feel free to include the above URLs directly into your site and you will get the full performance benefits of a quickly-loading jQuery.
Additionally you can also load the URLs directly from Microsoft and Google’s CDNs:
Microsoft CDN: http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.5.2.min.js