Without knowing anything more about your installation (which might in fact be broken), my best guess is that your column method on $data is not binary-clean.
You can test to see if freeze and thaw are working with a small one-liner:
$ perl -MStorable=freeze,thaw \
-lwe 'print ${ thaw freeze \"hi mom" }'
hi mom
You can also test your column method more specifically, something like this:
use bytes;
my $orig = join '', map chr($_), 0 .. 255;
$data->column( 'data', $orig );
my $new = $data->column( 'data' );
if ( $orig ne $new )
{
die "method 'column' is not binary clean!";
}
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