Audyssey will make good calibrations only if the room setup is the same as when you listen to your AV system. everytime you change something in the room, you must recalibrate.
Yep, I ran the calibration with the furniture where it sits when I watch movies. I'm probably only going to have the chairs around the table when people are over for football or something similar.
Pan TH-50PZ800U Onkyo TX-SR805 Axiom M80 (2) Axiom VP180 Axiom QS8 (2) Axiom EP500 PS3, Harmony One