Uninitialized value warning when deleting POP3 message

I have a script running as a cron job that read messages from a POP3 server, processes them for posting to a weblog, then deletes the message from the POP3 server.  This is the code I'm using to open the POP3 folder:

    use Mail::Box::Manager;

    # prepare the POP account
    my $mgr = Mail::Box::Manager->new;
    my $folder = $mgr->open(folder=>'popmail',
                            type=>'pop3',
                            username=>$popuser,
                            password=>$poppass,
                            server_name=>$popsite,
                            access=>'rw',
                            log=>'ERRORS');

After the folder is open, it goes through each message:

    foreach my $message ($folder->messages) {
      ...
      <read and process each message>
      ...
      $message->delete;
    }
    $folder->close(write => 'NEVER'); #close POP without a local store

When a message is deleted, cron e-mails me the following warning:

    Use of uninitialized value in numeric ne (!=)
    at /usr/lib/perl5/site_perl/5.6.1/Mail/Box/POP3/Message.pm line 47

This is the code from Mail/Box/POP3/Message.pm where the warning occurs - it occurs when "if $newdel != $olddel;" is evaluated:

    sub label(@)
    {   my $self = shift;
        $self->loadHead;              # be sure the labels are read
        return $self->SUPER::label(@_) if @_==1;

        # POP3 can only set 'deleted' in the source folder.  Don't forget
        my $olddel = $self->label('deleted');
        my $ret    = $self->SUPER::label(@_);
        my $newdel = $self->label('deleted');

        $self->folder->popClient->deleted($newdel, $self->unique)
            if $newdel != $olddel;

        $ret;
    }

Am I doing something wrong, or is this a problem with the Mail::Box::POP3 code?  The messages are deleted properly - the warning is just annoying and I'd like to get rid of it.  Currently I am suppressing the warning by using 

     #!/usr/bin/perl -X

...at the top of my script, but this seems like overkill to me.

If this is a problem with the Mail::Box::POP3 code, could code in my own script delete the messages safely without totally confusing Mail::Box?

David Phillips
[email protected]
http://tweezersedge.com/