Ha, you and I noticed the same thing just moments apart. Hopefully someone will reply on this thread to our question, because I can't imagine having to upgrade all of my projects immediately whenever a new version of any library was released.

EDIT: Looks like the URL pattern just changed slightly for jQuery. 2.72 is still around:

http://cdnjs.cloudflare.com/ajax/libs/jquery/1.7.2/jquery.mi...

Looks like they host back to 1.6.1, probably when the library was added to the project:

https://github.com/cdnjs/cdnjs/tree/master/ajax/libs/jquery