I received Casio's newsletter today and I opened it because the subject line referred to the new Exilim EX-S10 which I bought on the airport last week. (It's all about relevance, right?)
This is what I saw in my Outlook 2007 inbox:
I immediately noticed that something wasn't rendering properly. This is what I was meant to see:
What is the problem here? Simple: the camera picture was included as a background image and background images don't render in Outlook 2007.