  We examine angular distributions of leptons arising from the decay of J/psi
in inclusive hadroproduction. Taking into account feed-down contributions from
chi_{1,2}, a flat distribution emerges without fine tuning parameters. Changes
in the ratio of direct to total J/psi cross sections would change this
distribution significantly. Such angular distributions are, therefore,
confirmatory tests of the J/psi suppression signal for the production of a
quark-gluon plasma. Related effects are predicted for the Upsilon.
