Thanks for your help. I've submitted the report.
A couple of notes, as I tried several things over the last two days:
-PAR::Packer is unavailable from ActiveState's ppm service. Why? Not because there was an actual failure in the build, but because the output of the build was too large. I'm not implying that this is PAR::Packer's fault, especially as I was able to build it myself. It would be nice if ActiveState would change their process so that it was available through ppm.
-When building the executable with pp -o mytest.exe mytest.pl, it fails if there is an existing mytest.exe. I normally would expect it to overwrite the file.