My form contains an image field (image upload).
From the content screen I click the "edit article" icon in the joomla tools-ribbon below the article title (on top) to use the "form" to edit the record.
In that form, as long as the record contains an image (that was uploaded when creating the record) - the client throws an exception: "ReferenceError: JCck is not defined" (the submit button of the form ignores any click and the record can't be saved).
If the record has no actual image in it - all works fine.
Seblod 3.1.1