Javascript that worked in CS4 not working in CC

Question

I wrote a Javascript tool that creates perspective grids in Photoshop a while ago.  It works fine in Photoshop CS4.  However, I've been getting a few emails complaining that it does not work in CC.  I've checked the CC release of the Javascript in Photoshop reference guide, but it appears that nothing has changed relevant to my code since CS4.  Any idea what's happening in PS that is causing this script to fail?
http://kitfox.com/projects/photoshopPersp/Perspective%20Grids.jsx
Full webpage:
http://kitfox.com/projects/photoshopPersp/index.html

Answer 1

I've changed the script.  I now create my path layer using the below function.  However, even after explicitly changing the ruler units to PIXELS, the paths I create all seem to be measured in POINTS.  Even if the original ruler unit is PIXELS this still happens.  Is there any way around this (that is backwards compatable)?
function createPathLayer(title, subPathArray)
    var docRef = app.activeDocument;
    var originalUnit = app.preferences.rulerUnits;
    alert("Orig units " + originalUnit);
    app.preferences.rulerUnits = Units.PIXELS;
    var myPathItem = docRef.pathItems.add(title, subPathArray);
    alert("New units " + Units.PIXELS);
    app.preferences.rulerUnits = originalUnit;