Forgive me if this has been gone over, but what's the behavior if a single-precision Pd tries to load a double-precision external or vice versa? Does it fail to load or simply crash?

If it crashes, maybe there needs to be some mechanism to query the compiled precision of the external, ie. some sort of function pointer or define, etc. If it's not there, then assume single-precision and act accordingly. It would be nice to have useful error print concerning this. I'm just musing here. :)