This is probably a problem with your security settings - specifically the Security setting, “Navigate sub-frames across different domains” is Disabled.
Setting this to Enabled results in no JS errors, and the apps load. By default, the IE6 security level is Medium, which defaults to having this setting enabled. To see the Security setting, go to Tools->Internet Options->Security tab->Custom level button, then scroll down until you see “Navigate sub-frames across different domains”.