error installing courier-pop package

[Peter Matulis]

I tried to install the courier-pop package on my 4.0 system and it 
complains:

$ pkg_add -v courier-pop3-3.0.5p1.tgz
Error while reading header at /usr/libdata/perl5/OpenBSD/Ustar.pm line 104.
Here is part of Ustar.pm:

sub next
{
   my $self = shift;
   # get rid of the current object
   $self->skip();
   my $header;
   my $n = read $self->{fh}, $header, 512;
   return undef if $n == 0;
   die "Error while reading header"
       unless defined $n and $n == 512;
   if ($header eq "\0"x512) {
       return $self->next();
   }