FWIW, I have 30 versions of perl from 5.8.8 to 5.17.0 installed. I tested Date::Manip on all 30 versions---all passed.

#!/usr/bin/perl 

BEGIN {
    $| = 1;
    $ENV{'DM6'} = 1;
    $ENV{'TI_MODE'} = 'inter';
}

use strict;
use autodie;
use warnings FATAL => 'all';

use CPAN;
use Test::Inter;
use Date::Manip;

my $t = new Test::Inter;

$t->feature( print "Perl: $]\n" );
$t->feature( print "OS: $^O\n" );

if ( $Test::Inter::VERSION eq 1.03 ) {
     $t->feature( print "Test::Inter: ", $Test::Inter::VERSION, "\n");
}
if ( $Date::Manip::VERSION eq 6.32 ) {
    $t->feature( print "Date::Manip: ", $Date::Manip::VERSION, "\n");
    $t->feature(print Date::Manip::ParseDateString("10:20"), "\n");
}
else {
    CPAN::Shell->install(
    Task::DualLived
    Test::Inter
    Date::Manip));
}
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