I am using Facebook's Comment box and receive following error in Firefox 8.0 (No errors in other browsers).
uncaught exception: Error: Permission denied for https://www.facebook.com to get property Proxy.InstallTrigger
Comment box works perfectly, I'm just curious if there's a way to fix this
I'm adding FB to an existing site and ran into the same issue. On IE, the same issue didn't happen but instead I got an error about a missing root. Moving my SDK call to below the fb-root div cleared both problems.
Hard to believe that would be the explanation for sites that previously worked with FB, though.