  Electromagnetic and (linearized) gravitational interactions of the
Kalb-Ramond (KR) field, derived from an underlying ten dimensional heterotic
string in the zero slope limit, are studied in a five dimensional background
Randall-Sundrum I spacetime with standard model fields confined to the visible
brane having negative tension. The warp factor responsible for generating the
gauge hierarchy in the Higgs sector is seen to appear inverted in the KR field
couplings, when reduced to four dimensions. This leads to dramatically enhanced
rotation, {\it far beyond observational bounds}, of the polarization plane of
electromagnetic and gravitational waves, when scattered by a homogeneous KR
background. Possible reasons for the conflict between theory and observation
are discussed.
