Nice find EEF!

It does appear to be a bug. Importing a texture on to a backdrop, pointing a camera at it and then put the camera as a texture on the object - try saving it as a favourite and "computer says no", well it doesn't say anything. It just doesn't save.

In the mean time, I'd suggest saving the backdrop as a favourite and setting up the camera output as a texture again when you want to use it.

Thanks for the heads up, we'll have a look at fixing it, though I suspect there won't be any we can do. It's a more complicated chain of events to be able to save it as a favourite. If you have a new empty scene with 1 camera, a ball and a backdrop and you were able to save camera 1's output as a favourite texture on the ball and then went to another set file with 3 cameras, of which all 3 cameras are pointed at your character and / or scene then which camera's output should be used to apply the texture? None of the cameras are actually going to be pointing at the world map texture you had in the previous set. If you follow me...