To reproduce:
1. Open attached project on a Mac OSX 10.5.8 system
2. In Layouts > select Revert Factory Settings
3. Go to Scene View and create a cube object
4. Zoom in and out on the cube via scroll on the mouse and via the "F" shortcut
5. Change the layout to something else
6. Grab the object and move it around in the scene

Perform steps 4 - 6 more than 4 times and observe that one or more of the following behaviors happen:

- Most of the GUI goes white and user can not work in the editor.
- Text in some of the windows look weird and unreadable
- Editor gets unresponsive and user has to restart the system

Reproduced in 3.4.2 and 3.4.1.