If you have any problems, be sure to check first if it isn't a well-known Perl problem. The Bugzilla trouble-shooting page at http://www.bugzilla.org/docs216/html/troubleshooting.html documents them well. If the problem doesn't match, send a message (see Chapter 7), along with any relevant information (including relevant contents of your apache error log file), and I'll be happy to help you out.
If you see an error message like:
[Tue Jan 6 08:41:49 2004] [error] Bizarre copy of HASH in assign at
/usr/lib/perl5/5.6.0/Carp/Heavy.pm line 79
This is apparently due to a bug in Perl 5.6.0. If you upgrade
to Perl 5.6.1, the problem should go away.