  Theories in which the Peccei-Quinn phase transition occurs after inflation
tend to suffer from problematic domain walls. One possible solution involves a
small, explicit breaking ot the symmetry. But this raises other potential
issues. We review some aspects of axion domain walls, focussing especially on
this proposed solution. We argue, in disagreement with some recent literature,
that there is little axion radiation from the system until the domains actually
collapse. The same applies to gravitational waves and electromagnetic
radiation. The final stages of the collapse yields small numbers of extremely
energetic axions, which interact only rarely with ordinary matter, and are thus
relatively harmless. We then note that, if one accepts a remarkable
coincidence, this solution can be acceptable. We consider a possible
explanation of the required coincidence
