I previously raised this issue with Slidedeck 2.2 which I thought v2.2.2 had fixed.
Since upgrading to 2.3, it has returned - so maybe it wasn't properly fixed?
I use WP Super Cache for the CDN functionality, and when the CDN is enabled I do not get any images in my slidedeck.
When I exclude the SlideDeck JS files being served from the CDN the SlideDeck works, including if the images are coming from the CDN
While I have a workaround in place, it would be good if I could serve the Slidedeck JS files from the CDN for the additional performance uplift
See http://www.oasport.com for an example of the workaround in place