I think that the problem is with weakrefs. Your system may not be setup to use weaken properly. I put this script together awhile back to make sure that I could handle weaken. Run this, and see if the problem goes away.
#!/usr/local/bin/perl

use strict;
use warnings;
use CPAN;

CPAN::Shell->install(

"Task::Weaken",
"Cache::Weak",
"Class::WeakSingleton",
"Convert::Scalar",
"Data::Structure::Util",
"Devel::Cycle",
"Devel::Monitor",
"Devel::Peek",
"EO::WeakArray",
"Hash::NoRef",
"IO::Plumbing",
"Scalar::Util",
"Set::Object",
"Test::Memory::Cycle",
"Test::NoXS",
"Test::Weaken",
"Tie::RefHash",
"Tie::Util",
"WeakRef",
"WeakRef::Auto",
"XML::Parser");

[download]

In reply to Re: Warning from XML/Twig.pm : Use of uninitialized value in numeric eq (==) by Khen1950fx
in thread Warning from XML/Twig.pm : Use of uninitialized value in numeric eq (==) by jthomas

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