QOpenGLWidget mess up with app layout/pixel ratio on Retina screens

Adding a QOpenGLWidget to an application on a Retina screen blows the layout/pixel ratio of the entire application.
Simplest repro: build and run the QOpenGLWidget example from the SDK.

The app layout/pixel ratio is messed up as soon as:
-you add a QOpenGLWidget to the main window layout
-or you have a QOpenGLWidget created with the main window as the parent

Screenshots provided:
-QOpenGLWidget example running on a non-retina screen
-QOpenGLWidget example running on a retina screen
-QOpenGLWidget example running on a retina screen, and the QOpenGLWidget is not added to the layout
(done by commenting the line m_layout->addWidget(glwidget,1,0,8,1)

I have the exact same problem on my own application.
Looks like the application is stretched x2 from the bottom left.

You can enable HiDPI on any OSX>=10.7 using the following command line:
sudo defaults write /Library/Preferences/com.apple.windowserver.plist DisplayResolutionEnabled -bool true
The additional resolutions then appear in the display settings

Here's the GPU detail:
GPU: Apple Computer, Inc. / Apple Software Renderer
OGL: 2.1 APPLE-9.0.83 / 1.20