jQuery has been upgraded from 1.7.2 to 1.11.
There have been several changes to the jQuery code that may need corrections in our js code.
1.8 Release notes - https://blog.jquery.com/2012/08/09/jquery-1-8-released/
1.9 Upgrade Guide - http://jquery.com/upgrade-guide/1.9
1.10 Release notes - https://blog.jquery.com/2013/05/24/jquery-1-10-0-and-2-0-1-released/
1.11 Release notes - http://blog.jquery.com/2014/01/24/jquery-1-11-and-2-1-released/
Most of the breaking changes are cause by the 1.9 version.