For all of you out there who use Facebook API, there is a new bug in town that today prevented you from using the insights call on public Facebook pages: https://developers.facebook.com/bugs/607515569406680/
The bug fix is now being deployed by Facebook, so hopefully if you try one of my tutorials soon, you may not experience any issues.
You should also be able now to use the insights call on your own pages. The bug that was reported here is also fixed.
