The nice functionality of Ext-JS accordions to administer the plugin has one problem - the labels are fetched from the parent frame. If the parent frame (i.e. WordPress backend) has been loaded via https, still the accordion iframes are loaded via http, and then the browser does not allow access to the config item in the parent frame. The developer knows about the problem and I assume it will be fixed in the next version. Also a nasty problem with full-screen mode / wordpress dropdown menus behind the plugin has been solved.
You can read all about the fixes and get a vastly improved german translation here: DHTML Forum
It took some hard work to get it all running properly - but it was really worth it. I looked at about a dozen other plugins, and none of them had half as good features as this one. I give it top marks!