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).

Any ideas?