Differential cross-sections for the reactions d(gamma,pi (o))d and d(gamma,
pi (o))pn have been measured at MAMI with the TAPS detector setup in the en
ergy range 140 MeV < E-<gamma> < 306 MeV. By use of the Glasgow tagging spe
ctrometer an 0.8 MeV energy resolution for photons incident on the target w
as achieved. The <pi>(o) missing energy resolution was sufficient for a rel
iable separation of coherent and incoherent channels. The data for the brea
k-up channel exhibit very strong final state interaction effects, whereas t
he observed angular dependence of the inclusive process d(gamma, pi (o))X i
s in quantitative agreement with predictions for a quasi-free process. The
observed absolute d(gamma, pi (o))X cross-sections, on, the other hand, are
significantly smaller than predicted by the quasi-free process for E-gamma
greater than or similar to 250 MeV. Associating this failure with the pi (
o) photoproduction on the neutron would suggest that its cross-section is u
p to 25% below the presently believed value.