Closing SRB2 black screen.

I don't know what the root of the problem is, but half of the time when I quit SRB2. Music continues playing, the screen is black. And I can't do anything. I have to hit the power button to restart my computer. And it seems that the screen resolution has nothing to do with this, as even when using the reccomended green resolutions; it still occurs.

I assume using windowed mode is a workaround. :-/

What happens when you press the power button? Does SRB2 close and the computer shuts down normally? If so, what happens if you use Alt+F4 instead of the "quit game" button? Or Ctrl+Alt+Del?