I have MenuMeters installed, so I can always watch my processor activity in the menu bar. It seems that processor #1 is less active than the other 3. Even when the system gets busy, and activity increases on the entire set, it seems that #1 is always a couple of notches lower than the rest. I run an eDonkey server around the clock, and it has a tendency to max out a random processor individually on a rotating basis, but #1 rarely seems to get chosen for one of these spikes. Hardware Test never complains about it, so I don't know if it's worth fussing about. Is there something special about the first processor that the System withholds it from regular usage?