In the preview all looks fine
http://img507.imageshack.us/img507/6739/beforery9.jpg

but when I render the scene I get this effect happening
http://img507.imageshack.us/img507/7104/afterhr1.jpg

Can anyone shed any light on this please, the background image is part of the scene. I assume it is being treated as a texture.

Any input is welcome, thank you.