Turning on performance cacheing stops site working properly
A strange problem: when all caching and bandwidth options are turned on to improve performance, some parts of the site stop working. These include:
• When trying to create a new Publication (a content type that I had created), all the menus following the Create Variation button (product catalog, menu settings, URL path settings etc.) lose their clickability (yup, it's a word, but very bad in Safari as these options cannot be accessed at all);
• Cloud Zoom functionality on the product page is lost. Clicking the main image displays a new window with a fixed main image, rather than the ability to scan around within the existing image display area. Formatting of this page also is changed (set with Display Suite).
Narrowed down to Aggregate JS files
I've narrowed the problem down to turning on Aggregate JS files in System -> Performance. It really screws up Cloud zoom.