I experience this same problem from time to time on my shopping cart display. Its seems to be random when the shipping shows up.

I don't know if this is related, but I get the same "no refresh" when the customer lands on the home page after leaving the site. I have auto login installed and when the customer returns to my site it looks like they are not logged in. They must refresh the page to see the appropriate links (log off, etc.).

Sweet

www.sweetzouzou.com