A Riemannian metric on a manifold is said to be IP if the eigenvalues of th
e skew-symmetric curvature operator are pointwise constant, i.e. they depen
d upon the point of the manifold but not upon the particular 2 plane in the
tangent bundle at that point. We classify the IP metrics in dimensions m =
5, m = 6, and m greater than or equal to 9.