silverstripe/silverstripe-blog — pull request #111 by jflearn (2014-02-14 17:44:12+00:00)
Title: Uncaught Exception: Object->__call(): the method 'data' does not exist on 'Security'

I ran into the above error when I had the tagcloud widget included on a login page. Looks like the security controller does not have a "data" method. This pull request explicitly handles that situation in BlogTree::current().