After upgrading Magento from 126.96.36.199 to 1.9.3, configurable swatches appears to be broken on the product page for all themes. When you click on color swatches (other than the default) the product image no longer switches. The grid and list product view still work but I receive the following js error on all product pages:
Uncaught TypeError: Cannot read property 'productId' of undefined
Has anyone else experienced this issue and been able to resolve it?