Your script produced similar results under Win7 when I ran it. However, the following ran equally well on Win7 and Lunix:
use File::Temp qw/tempfile/;
my $fh = File::Temp->new();
print "$_\n" for 0 .. 4;
$fh->seek( 0, 0 );
print for <$fh>;
IO::File's new_tmpfile can also be used like File::Temp--in case it may work better for you:
my $fh = IO::File->new_tmpfile or die $!;
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