It could be the resonance of coils interacting with the tone control. Did you change the cap from the stock value? If you have an rlc meter, or know the inductance of the pickups, use this equation to find the resonant frequency (my knowledge is a little rusty about LC circuits, so help me out here): 1/(6.28*(L*C)^2)=F . L is in Henries, C in Farads, and F in hertz. If F=~110 then I think that might be PART of the issue, but please correct me if I'm wrong.
I fall asleep to Nightwish, Dragonforce, and Epica... and sometimes with my guitar still in my lap.