I have the SF apartment, so I loaded it up and gave it a go. I used the same camera angle, and loaded the same light, the 'Dusk By Dawn' IBL with AO on it (from the '!! IBL Ambient Occlusion' folder) and I can't get the IBL image to show up on the wall at all. I would suggest reloading Poser, and restarting the scene to see if it does it again.
I see why you are using that specific light, it gives cold, stark sci-fi style lighting.