Thanks Jimmy.
I checked the eCart object. I've attached a screen shot of the columns window. I have text selected for the ID. My images all load in the shopping cart. I had this problem once before and resolved it by changing the type in the database table from int to varchar. That doesn't seem to have resolved this issue with respect to the order receipt page. If you go back and look at the earlier screen shot, you'll see that pesky error message on the last line.
What am I missing?
Could this have anything to do with the fact that I'm running in the test mode with authorize.net?