The output of perl -V from the machine that had the problem should be included with any bug relating to perl.

I've allways thought it would be great if there was a "perl -VV" that also included info on all of the installed perl modules, including version number, and for each of those modules that have "non perl dependancies" (ie: native libraries) the versions of those dependancies ... so that when included in a bug report, everything would be very clear.... "Hmmm, this person is getting a bug in my code when I walk the XML tree ... they are using 5.8.0 on Debian Linux, with XML::Parser version v1.5.1, which is using libxerces-1.1.so installed from .deb ... interesting, I should try that configuration."