OK... I have now *really* narrowed it down.

Everything works ok, if I remove the following "optimization" line from the 'parse' subroutine in Forms.pm:

   eval {
    # optimization
   $p->report_tags(qw(form input textarea select optgroup option));
    };
[download]

For some reason though, this optimization works ok in RedHat8.0/perl5.8.0 but fails to work correctly in Fedora Core 1/perl5.8.1