My client just did a test with the template builder and then sent a test mail to PC outlook 2007 and when they add an image (they did nothing else but add an image), it breaks the layout. Further to this frustration your design and spam testing tool shows no errors in Outlook 2007 even though my client is having this issue. Screenshot is here:
Preview is here:
Client has asked others to test and it;s coming back as the same problem.
I should also add that I have tested it everywhere and it looks fine (I'm on a mac)
Any suggestion as to why this is happening, but also why the design spam tool is showing no errors. I should say the version of Outlook the client is using has no restrictions out on it...