Browser Back Button Breaks Etherpad Document

*This issue is intermittent and I was only able to replicate it in IE 10*
Browser: IE 10
OS: Win 7 SP1 64-bit

Issue: When typing on an etherpad document if a user clicks the Home button and then uses the browsers Back button to return to the etherpad document it will show broken text. 

Please see screenshot for details on broken text.

![browserbackbutton](https://f.cloud.github.com/assets/4571236/655216/59e14d60-d50d-11e2-90bf-fcd85c48b702.jpg)