My biggest beef is that my fav add-ons haven't caught up to 4.0 yet and until they do I've gone back to my comfort zone in 3.6.16. However, there were also some "beta" issues I noticed: - Form buttons don't seem to work properly (Submit went grey when clicked on, but form did not close); - No Refresh icon (yes I know I can right-click on the tab, but that's a pain - I want the Refresh icon back on the toolbar); - The Back button lost its separate drop-down arrow (again, right-click on the Back button will list Back history, but I want the separate arrow). Hope some of these issues get fixed soon. Until then, I'll stick with the tried and true, thanks.