Ray - I have the latest version of eCart installed. I'm so glad it's not me! Thanks so much for your help. I'll submit a support ticket to get some help about this bug.
I can get the cart to work to a point and then everything blows up on final checkout after the confirmation.
Everything is working except for the fact that the images are broken .jpgs in all of your WebAssist software. (That's a Mac bug I read - it's annoying but I can work around it.)