Thanks everyone, this seems to have been resolved.

Based on a quick search of the forums, I did not see a solution to this problem. I am using Sketchup Make 2015 on mac osx, I have the newest update of SU, the newest flash player, and have cleared all my browser chaches.

When I select the face of an object to add a photo texture from streetview, the window pops up normally, and shows the correct geolocation, when I go to select a region, however, the preview turns bright magenta! I can see and manipulate the selection rectangle, but the image preview underneath is lost.

If i create an arbitrary polygon, and select the region it will show up properly on the face, I simply cant control what is being sampled for a region because of the magenta color obscuring the preview.

see example below: