I normally have music in my headphones while I'm coding so I didn't notice anything at first, but then I heard an odd noise so I turned off the music and pause to listen, and I hear the unmistakable DM bump-bump sound of footsteps approaching. I figured I had just forgotten to shut down DSB so I looked for the window... there was no window. I checked the taskbar... nothing. I pressed alt-tab and cycled through the windows... no DSB window anywhere. And then the sound of a mummy attacking: "Haa!"
After I pulled myself off the ceiling, as it turned out, what happened was that my fix told Allegro to close the DSB window; my thinking was that this would shut down the program, and, indeed, that's what seemed to have happened. However, it really just did that and only that: it closed the window. The program continued to run in the background.
I pressed ctrl-alt-del and found the process and killed it and all was well.
