Can interact with parent window when properties dialog is open
Submitted by Allan Day
The properties dialog window is modal - it is attached to the parent window, and the parent window is shaded. However, you can still interact with the parent window below: you can press the new button in the header bar, and the thumbnails react on hover.
This is odd and creates some surprising interactions. When a dialog window is modal to its parent, you shouldn't be able to interact with that parent until the dialog has been dismissed.