Tom,
Yes I've noticed continuing issues. Refreshing the page helps. For example, if someone PM's me, I will get an email notification. However to see there is a new PM, I have to refresh the main page. Then when I click on Private Messages, once that page comes up, I have to refresh that page as well to see the new PM. How you refresh or reload a page depends on your platform (PC, Mac, phone) and the browser you are using.