Updating CCDirector's winSize when going full screen?

The new setDesignResolutionSize() has changed a lot of how CCDirector’s window size works. It used to be more flexible. When a Cocos2d-X Mac application went fullscreen, CCDirector’s getWinSize() accurately returned the new size of the window. Now, it stays rigid.

Does anyone know how to get the director to update its window size post 2.0.2, particularly on the Mac platform?