The javascript interface interprets whitespaces differently in Flash vs HTML5 and causes problems in Flash.
Assume you have the following code:
In the first case with both HTML5 and Flash what gets passed to javascript is: click.log('Tasty')
In the second case HTML5 passes click.log('Tasty') but Flash passes click.log('get(kdata)')
IMO the HTML5 and Flash implementations really should be consistent and, unless I missed it, better documented.