Hi John,
Does this happen only with the Batch Debayer script? For example, could you try with the FFTRegistration or BatchFormatConversion scripts, to see if we have the same problem with them? Also, does this only happen with the 64-bit version, or also with the 32-bit version?
I ask because unfortunately I am far from my Mac machine right now (I am supposed to be on vacation), so I cannot test it by myself.
Anyway I'll try to fix this problem as soon as I can. Sorry for the inconvenience.