I'm building a Facebook app and I have noticed that when attempting to get the login status of the user using their Javascript API, I sometimes get the error:

Refused to display document because display forbidden by X-Frame-Options.

I've been able to reproduce this every time I hit the check login status page of the app only while using Facebook as a page, rather than my user account. This is easy enough to avoid now that I know this causes the problem, but obviously my users may not know this.

Is there a way to determine whether or not the user is using Facebook as a Page or not? Since that seems to pretty much ruin my entire app.