If you are reporting a bug in the perl interpreter or the modules shipped with Perl, use the perlbug program in the Perl distribution or mail your report to perlbug@perl.org .
If you are posting a bug with a non-standard port (see the answer to "What platforms is Perl available for?"), a binary distribution, or a non-standard module (such as Tk, CGI, etc), then please see the documentation that came with it to determine the correct place to post bugs.
Read the perlbug(1) man page (perl5.004 or later) for more information.