When I change from one running application to another, I no longer see the topmost (or any) window from the new app. I now have to select a window from the menu bar.
This is a new and unwelcome behavior. Until semi-recently, switching to another running app would bring up whatever window was last open. I suspect this is a setting somewhere, but I don't know what or where. Can someone suggest how to change this to the previous behavior?
On MacBook OS X 10.8.2