Jira inside Frame/IFrame broken

We used to embedd Jira, Confluence etc. inside a IFrame to create a Jira Studio like look (index.html).
This works fine until Version 4.1 of Jira.

So now any Jira Page (direct.png) gets displayd broken if it is embedded inside a Frameset or IFrame (iframe.png).
(or is there any bether way to display Jira etc. inside a Frame?)

See JRA-21153 for more info and detailed analysis