  Coulomb drag between two parallel two dimensional electron gases has been
measured at high magnetic fields in samples with two different layer spacings.
As the layer filling factor deviates from nu=1/2, we find that the magnitude of
the drag is enhanced quadratically with Delta nu = nu - 1/2, and the curvature
of the enhancement is insensitive to both the sign of Delta nu and the spacing
between the layers. Our results suggest that the enhancement is not due to
non-perturbative interlayer correlations.
