Security token was missing or mismatched

[Trevor Hannant]

What do you have set as the Canvas URL and Secure Canvas URL in the Facebook Developers pages here:

https://developers.facebook.com

Also, what are the same values in your app's config.php file?

[John Creser]

Facebook url
http://apps.facebook.com/newzealandj...0&fb_bmpos=2_0

This error is posted back as the content FB displays

FB debug:
http://developers.facebook.com/tools...andjustice.com

Any ideas what can cause this?