Painting glitches because wrong invalidate region

1)Open My Computer.
2)Double click on "Local Disk (C"
3)Double click on "ReactOS"
4)Double click on "System32"
5)Double click on "drivers"

Now close "drivers", the underneath "System32" window is shown.
Then close "System32", the underneath "ReactOS" window is shown.
Then close "ReactOS", the underneath "Local Disk (C" window is shown.

Each time you close a window, and the content under it is shown, there is a visual glitch at the left.