[Interest] 5.3 RC1 OS X - strange white area in my widgets-based app

[Paul Miller]

On 5/9/2014 9:56 AM, Paul Miller wrote:
> I just replaced 5.3 BETA with RC1 and my application on Mac
> (widgets-based, with OpenGL) now has a solid white area (exactly
> 640x480) covering the top-left corner of the window. What is this?

I eventually tracked this down to some old QMainWindow layout 
preferences. Once I deleted them, the white rectangle went away. Weird.