Since the 3.3, it seems that the W3TC is having trouble combining java-scripts as I get errors accessing the cached version of the site.
One of the errors: Uncaught TypeError: Object [object Object] has no method 'datepicker'
This is not a conflict of different scripts to be clear.
You can see the error on here http://dreamdare.org (inspect element) For example you can try the back to top button and it should scroll but jumps at the moment. It also should hide until half page which doesn't either.