[Tassilo]

I've set up a scene with Indirect Light (AO, no interpolation, light through transparency). To simulate print on walls, I placed planes with the print including an alpha channel onto the walls. The alpha channel is correctly set up (alpha and black have got a full value).
Rendering the scene without indirect light gives me a fine result in these planes - rendering with AO on results in a dark rectangle around my wall print (see attachment). Rendering with Full Indirect Light is fine again.
Does anybody of you know about a workaround to use these alpha channel planes without that bug with Ambient Occlusion?

Thanks a lot,
Tassilo