  I review some open questions relating to the large transverse momentum
divergences in transverse moments of transverse momentum dependent (TMD) parton
correlation func- tions. I also explain, in an abbreviated and summarized form,
recent work that shows that the resulting violations of a commonly used
integral relation are not perturbatively suppressed. I argue that this implies
a need for more precise definitions for the correlation functions used to
describe transverse moments.
