I'm trying to set my application to full screen and back in Qt 5.3, but I'm running into some issues on Mac. When I use `showFullScreen()`, it goes into full screen as expected. It uses the standard Mac full screen mode where it opens in a separate desktop/space. However, when I call `showNormal()` to return from full screen mode, the application window just disappears and I'm left with a gray background. I need to swipe in order to return to the regular desktop where the application is. 

Is this a bug in Qt or am I doing something wrong? I'm on OS X 10.9.3.