I've tried to Edit my PBP-campaign (from the "Campaign Info" tab) a couple times today, and also a few times 3-4 days ago, but each time clicking the "Edit This Campaign" button has only produced an error page.
It would be nice if this behaviour could be fixed (if it's related to something on Paizo's end), although I certainly understand if it's not a priority :)
I'm using IE 10 on Windows 7.