MarkerManager displaying default marker instead of custom marker?

I am not sure when this broke. But I was previously adding markers as follows:

     addTheListener(marker);

     var MapPin = { url: 'http://goo.gl/'+pinlink };

     marker.icon=MapPin;

     mgr.addMarker(marker, 6);

Custom marker displays as intended when pulled up directly in browser.
For example: 

     http://goo.gl/EGEsp

Used to work within MarkerManager on my web page but now only default marker is 
being displayed???

Any guidance would be appreciated! Thanks!

Demo link or sample code:

  http://foodtrucktracker.com/bug/

Browser / Operating System:
All browsers

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Original issue reported on code.google.com by etick...@gmail.com on 12 May 2013 at 7:10

vaibhavkothia / google-maps-utility-library-v3

MarkerManager displaying default marker instead of custom marker? #256