Yes, I would like to know how to to be able to randomise the images on a single page, can you explain? Many thanks.
The plugin loads an obsolete version of the jQueryUI script, which is conflicting with the version bundled with WordPress (1.9.2 at the time of writing).
Open df-draggable.php and update lines 79 and 113 to point to:
http://ajax.googleapis.com/ajax/libs/jqueryui/1.9.2/jquery-ui.min.js.
Sorted.