the problem is the flickering inside the glass material on the furniture
my settings are:
and i posted the animation here:
http://www.minimum.com.mx/tests/arenas\_anim.mov
thanks!
Probably you dont have enough photons subdivisions, try to uncheck reflections and refractions for photon map calculations first, and also hide the glass objects, this can help a lot
Using a number like 450 for max photons it will slows down a lot the irradiance map calculations and blur every GI detail
Gonçalo