Push.js cache making "go back" weird.
I have bar-nav and bar-tab for header and footer everypage, 
sometimes when i press the back button on my phone or 
a javascript link which have history.back function,
the page will have two "header" and footer".

The only 'fix' I can do now is remove push.js from javascript ,
or change the cache size down to 0 from 20.

Anyone having same issue?

![unnamed](https://cloud.githubusercontent.com/assets/7055205/2728756/4cc0a86c-c5fb-11e3-95ca-787a45c58bcf.png)
