I guess something must be flaky with my installation of Perl (5.8.0 Win) on this machine. When I do a Copy & Paste into the command line, it doesn't do anything. goes through without any errors.

This is a Windows command line quoting issue - Simply rearrange the single and double quotes as I have in the signature of this post and it should all work fine :-)

perl -le "print+unpack'N',pack'B32','00000000000000000000001001111110'"