With Firebug I see that the request Dojo are all in 1.6.1...
I see that when I Upload the Image use:
http://URL DOMINO/xsp/.ibmxspres/domino/ckeditor/plugins/image/dialogs/image.js?t=B73G
So that I think that the plugin file of Ckeditor are static and not in package JAR (Data\Domino\CkEditor)
/xsp/.ibmxspres/ = point to DATA URL of Domino