As I have spent a little more time adding some features to this site I stumbled upon a small bug with the Flickr module. The issue arose as follows. I installed and enabled the Flickr module version 6.x-1.0-alpha1, and did all of the necessary configuration. Enabled the filter and assigned to the desired input format. Then created a simple test page to verify that the filter does indeed work, and it does. So on to the Flickr block.