Buggs Rep:
-When the window being destroyed during proceeding WM_CREATE, The App will throw an exception.
-Sometime the scrollbar of the window(non-client area, not a scrolling-control) can't accept the mouse events(maybe this bug can't be fixed due to the XP's bug). You may minimize the main window and restore it again to gain control of the scrollbars, which may or not has effects.

Harder to find those buggs. I'v tested a few weeks. The TT became rocker!