I have one Magento shop up and running for about 1 year now, mostly without bigger complications. But since 1.9.3 is out I get problems with my configurable products. When trying to show the configurable product page that worked perfectly on 188.8.131.52 it win't show the configurable options of the product in 1.9.3 anymore. The page stops loading at the point where the option dropdowns should be displayed. I use Porto theme in the latest version. Are there any hints or is there anything I'm missing for the update on 1.9.3?