From the original Bass Player Magazine review:
"Another important element of the instrument's fat-and-round sound is the pickups' alnico "Tri-Pole" magnet configuration. Although the pickups appear to have 12 polepieces each, there are actually 22, as each string has two dedicated magnets directly below it, located underneath the pickups' covers. Fender says this arrangement reduces the "double-beating effect" for better intonation past the 12th fret, because the magnets have a softer magnetic pull, especially on the B and E strings. It works, as the bass has a very clean and stable sound in the upper positions, even along the B."
EDIT: On second reading, this doesn't really make sense to me... If each pup has 2 magnets per coil per string, and it's 5 strings, wouldn't each dual coil pup have 20 magnets (2x2x5)?