I'd like to know the answer to this too. I recently put on an Odyssey Springfield brake set up on my bike and it squealed bad from the first day, thought the pads had to break in so I left it for a while and just dealt with the horrendous noise. It just seemed to get worse, I threw on a set of cheepo pads a buddy had and ta-da squeal went away completely... For a couple days. Its not as bad as with the odyssey pads but still to the point where I'll drag a foot to slow down instead of pulling the lever if there's people around.
My rear rim is powdercoated, I'm hoping that's not the problem. I've tried tightening everything, took it apart and tried again, still squeals like mad. I had an old school Dia-Comp brake that worked great on before but I got the Springfield because I needed a low profile set up for chain clearance issues I was having.