Hi Adam,

 

That worked but it created another issue. The dialogs will pop up fine for all ImageGallery, TemplateGallery, InsertImage and InsertDocument and it doesn't freeze anymore. But in case of InsertImage and InsertDocument the "Insert" and "Cancel" buttons are below the bottom of the page and without scroll bars is impossible to click on them. This is the case in both with or without iframe.

 

Thanks,

Alex