Since I was the one who got this problem when running Grimshaw's files I'll explain the exact scenario. As mentioned by Grim, it was the release version, not the VS10 environment. However, I am on Win7 64bit, not 32.
Additionally, the application works "perfectly fine" even while moving the mouse, besides the actual drawing.
That is to say, I can left click to spawn circles, right click to spawn particle boxes or w/e and the console provides this output, even while doing this and moving the mouse. However moving the mouse completely halts the rendering, even though updates are clearly still happening (objects still being created and physics is still being worked out).
I can spend 1 minute spinning the mouse about (freezing the screen throughout) and as I left and right click, the console provides prompts. Once stopping mouse movement I'll see all the objects spawned neatly stacked up at the bottom, waiting for some other kind of event. So I guess the question is: How is moving the mouse somehow "skipping" the draw method? Maybe the source code could shed some light.