My mistake....
It works fine on
http://www.ocsurfwear.com but does not on
http://www.weartattoos.com. These are both recently converted stores to 4.5.2. The only difference is OCsurf is running CDSEO and weartattoos is using just Xcart clean URL's. If you click on pinit on weartattoos it reloads the page back to home instead of loading the pinit page but the URL looks weird:
http://www.weartattoos.com/#, it has a # at the end. Same behavior on IE and FF. Any ideas ????
Thanks