I've uploaded and inserted an image, it shows on the coupon creation screen until I hit publish or update, then the image goes away in the coupon settings area. The image doesn't show in the coupon, the preview, or the post page.
The site is http://colonial.www73.a2hosting.com/
I'm working on the Car Wash special coupon on the right. The coupon has a default color bar and an expiration date, that's it.