QGLWidget prohibits QListWidgetItem Selection

If I have a QGLWidget and a QListWidget in the same window, the QListWidget's items don't get selected when clicked on Mac. Haven't tried this on Windows yet.

Please see attached demo. It's the original demo with just a few lines of code that adds the QListWidget component and two items. Once you remove the QGLWidget from the window, the items can be selected just fine.

Update: The problem exists as well for the QTreeWidget but does NOT occur on QT 4.8 on Mac.