Hi,
Whenever I setup "Use AJAX when possible for add to cart buttons" to Yes, two things happen:
1st: It does not do anything when I click add to cart. If I open Chrome's inspector, it says I am getting a 403 error.
If I turn off SEF, it will add the item to the cart, but then I get into a second problem.
2nd: There is no pop up window when I add something to the cart. I've changed "Notice popup display time" up and down with no luck.
The only other components running on the site are Mosets Tree, AcyMailing, Akeeba, JoomFish! and FPSS.
I have looked through the forum and the only answers to similar questions were that there was a directory that crashed with SEF and some other components messing with it. Neither look like our problem.