Magento Bug: There is an acknowledged bug of Magento that prevents you to merge Javascript for working properly. To solve this issue, edit file js/varien/configurable.js, add a semi-colon (;) letter at the end of file. See the image as belows:
Magento Bug: There is an acknowledged bug of Magento that prevents you to merge Javascript for working properly. To solve this issue, edit file js/varien/configurable.js, add a semi-colon (;) letter at the end of file. See the image as belows: