defunkt/jquery-pjax — pull request #275 by acasademont (2013-04-16 12:25:07+00:00)
Title: Replace the bind() and unbind() aliases for the on() and off() functions...

....

This is done in order to leverage jquery custom builds without the
event-alias module, which removes the bind() and unbind() aliases.

See: https://github.com/jquery/jquery/commit/100d3c351604e1f9641098da2e78678b4e6d9cdf