What were your multipass settings set to? I vaguely remember discussion about a light jittering feature, and they get averaged out with multiple passes but might be noticeable at multipass=1x1. (And for good measure, what were you using for AO?)
5 passes and no AO. The jitter of the lights are within a single frame, each pass the light moves. and for each frame it starts over again. A 1x1 pass, the light will not jitter. I may have the light too far from the scene. But this should not be an issue for this project, the day/night lights should not be animated, you need to set it to the time of day at the start of your animation and leave it there. The only lights that could be animated are the the lights the user adds for the rooms.
Robert, the shadows aren't too bad, I'll post a new render animation as soon as it's done.