Dear Stephen,
first of all, thank you for the purchase!
Fuji has been tested on IE7 for compatibility issues, yet there may always be something that was left out. From the practical perspective, this version of Explorer is used by less than 1% (and falling) of the Internet user community, and is officially not supported by large websites such as e.g. Youtube. I will do my best to help in this situation – please provide a link to your website so that I could have a look at the code and the issues you’ve described.
Sincerely,
Andrew | Satori Studio