defunkt/jquery-pjax — pull request #270 by thousandsofthem (2013-04-05 08:57:25+00:00)
Title: Fix back button issue

How to reproduce an error:
* Click pjax link
* Click normal link
* Click "Back"

Expected: page should successfully load

What really happened: only pjax partial was loaded

Reason: adding `_pjax` param to pjax request was broken.

Why: plugin threats `options.data` as hash `{}` but it's array: http://api.jquery.com/serializeArray/