Check for worn pads, loose or missing shims, or binding calipers. I too was told by the dealers that brake squeal on the SVX was normal because of the metallic pads, but I think I now know how to tell the difference between normal and excessive. A brief squeal when the brakes are first applied could be normal. A continuous squeal under normal braking that goes away when the pedal pressure changes, either lighter or heavier, is probably indicative of something to be checked. In my case, both front calipers were severely binding. New pads with noise silencing shims all around and some Silglide to work the calipers free and they're now as quiet as ever. I could probably do with new glides too. Guess I'll call subaruparts Monday and add them to my already bulging order for $500 of miscellaneous parts.
KuoH