I am having trouble getting controlgroups to render with rounded corners when I create one on the fly. Creating controlgroups from the HTML works just fine.
In the following JSFiddle I first create a controlgroup from the HTML and then I create two controlgroups with the same settings as the first one. The second and third differ only in the property 'corners=true|false'.
In the JQM 1.3rc1 documentation I read that opening a panel automatically is done by callign the method open(). While this is straight forward enough, I would like to suggest a property like data-init which would take 'open' and 'close' (default). I really like the simplicity of the 'data-'-properties used elsewhere.
RC1 is out there, but maybe better late than never...