Hello -
I was using the built-in error page specification tool at admin » site configuration » error reporting to set my access denied (403) error to a custom designed 403 page. I used the panels module to build the custom error page. I then set the url of that custom page in the error reporting setting so that when someone visited a private section of the site they would no longer get the default Drupal 403 error, but instead they would be taken to my custom designed page.
Well, this is what happens when someone visits a forbidden page...the whole layout duplicates, showing the custom page and the default page.
http://dl.dropbox.com/u/192908/double.png
Anyone run into this before? Is this a panels bug? Thoughts?