#12 Normal vector of ring is wrong

[wmiaztahrd]

when I find the ring and then print the normal vector for the attached molecule, it says the norm is along the z-axis, yet, if you look at the input, the norm should be along the y-axis.

[wmiaztahrd]

The molecule

[wmiaztahrd]

sorry, I forgot to include:
Perl v5.8.8 built for x86_64-linux-thread-multi
PerlMol-0.35

Here is a short piece of code:

use Chemistry::File ':auto';
use Chemistry::Mol;
use Chemistry::InternalCoords::Builder 'build_zmat';
use Chemistry::Ring::Find 'find_rings';

$mol = Chemistry::Mol->read("tmp.xyz");
build_zmat($mol);
@rings = find_rings($mol);
($norm1, $d1) = $rings[0]->plane;
print $norm1;