Neutral pion production from the proton using photon beams in the energy range of 280-400 MeV has been measured from a solid HD target. This target is a novel design which uses molecular hydrogen-deuterium at very low temperatures, and will be used for polarized target experiments in the future. The current results are from an unpolarized target, but are used to compare neutral pions from H and D nuclei simultaneously. In this way, uncertainties between targets and different beam conditions are reduced. The physics that we learn is whether deuterium can be used as a "free neutron" target, or whether the bound neutrons with final state interactions make it difficult to extract free neutron observables. The results of free proton and bound neutron measurements will be compared from a viewpoint of isospin symmetry.