Yes, I'm not sure exactly your process. You've said you added an image "as per standard procedure" but perhaps you could explain exactly what you've done. Clicked 'create' under 'environment' in the camera attributes tab, and then loaded an image file in the image plane attributes, Then, assigned a lambert to my geometry, created a file node (as projection) for the diffuse, loaded in the same image file I used in the image plane into the file node, then linked that projection node to the camera. When first creating the image plane I've set it to 'only this camera' (or whatever it is) so I can only see the image plane in that camera view so as to avoid confusion. But if i need later to view that image plane in another camera; I cant find the attribute panel I need to check the 'in all views' option