This script smooths out the differences between the various browser
implementations of the HTML5 Drag and Drop Module.  It currently works with
Firefox 3.5+, Chrome 3.0+, Safari 3.0+, Opera 12 and Internet Explorer 5.0 
(Note: that is not a typo -- HTML5 Drag and Drop is based on work done 
by Microsoft in 1999). 

Note that this script is *not* a polyfill.  It just evens out the differences 
in browser implementations.

More information can be found at:

http://www.useragentman.com/blog/2010/01/10/cross-browser-html5-drag-and-drop/