Searched worked on the site I upgraded to 10 just a few moments ago. If you notice the menu is WAY over to the left when you click the hamburger button menu.. This happened to me too right after the upgrade. I have to go back into Protean > Styles and make sure my custom mix was chosen AND click the save button. When I did that, the site went back to my mix the way I had it. Not sure why that would happen but I assume it deals with the Dark and Light themes for Protean.