It seems odd that the firewall would block this page from displaying properly. When the firewall is set to pass, the page loads, and the content displays just fine. When the firewall is set to block, the page doesn't finish loading.
It's not an issue with protocol. It is certainly related to the firewall. It's not an issue with swf files, those show fine. It's not an issue with port 80 or 8080.
Does anybody know why this one particular site fails to load its content when I have the firewall set to block?