  I review new results on s-channel helicity nonconservation (SCHNC) in
diffractive DIS. I discuss how by virtue of unitarity diffractive DIS gives
rise to spin structure functions which were believed to vanish at x << 1. These
include tensor polarization of sea quarks in the deuteron, strong breaking of
the Wandzura-Wilczek relation and demise of the Burkhardt-Cottingham sum rule.
