I’ve some problems with WordPress and display the admin panel in an iframe. In the past I was able to access the admin panel through an iFrame from a different URL (https) than the blog itself. Since I updated to the latest version it is not possible any more, but hopefully I’ll get some help.
To be sure that no plugin is interfering I installed a fresh empty blog. Within the same URL I can access the admin area through an iFrame, fine. From a different URL I just get an empty white page.