@ Morana: I would also re-evaluate components in your scene.  Are you running displacement maps, bump maps in all your materials?  Is it necessary?  If so, is the displacement bound set higher than 0?  Disp. bound = 0 will cripple your render.  Material room Diffuse_value should be lower than 1; reset those to 0.8 - 0.7. 

@ GhostWolf: I seriously doubt those problems will go away with PoserPro 2010.  We will be getting another variable included in the mix: gamma correction + IDL!