The reason for different people experiencing different results is tricky but I'll try to explain it as clearly as possible.
In the beginning my computer did not crash when I maximized the window (don't worry, I'll explain why in a bit) but Alquerian's did. Maximizing the window is a simple and unobtrusive action that is uniform across all Windows OSs, right? Well, not exactly.
Alquerian is running his desktop with the Windows XP theme. I'm running Windows XP with the classic theme. If you compare themes you'll notice that with the Windows XP theme windows hug the edge of the screen whereas with the classic theme there is a locked resize border surrounding the window. The Windows XP default theme does not have this border. This can be proved by comparing the default behavior and a second example where I've limited the window resolution to be within the screen resolution.
Even though in the second image the window looks smaller it is in fact full screen. The border simply does not exist in the Windows XP default theme. To make the window border hug the edge of the screen the window is clipped 4 pixels in all directions which does in fact render the window larger than the maximum full screen resolution. In the case of Windows XP's classic theme this is not the default behavior.
For Windows XP's classic theme the default behavior is to draw the window border around the window while it is maximized. This is however, altered when a second monitor is installed. I confirmed this by installing Maxivista and created a multi-monitor setup between my desktop and my laptop. For some reason when this change occurs Windows XP will alter the window borders to hug the edge of the screen, even while using the Windows XP classic theme.
As these two examples show this does in fact render the maximized window larger than the maximum screen resolution. This is what made my program start to crash on my computer.
With all of this in mind I think it's safe to assume that this bug is capable of causing crashes on those running Windows XP with the default theme, those with multiple monitors, those who run alternate system shells such as DesktopX and Litestep, those who run alternate window themes using Window Blinds or other programs, and others.
This bug is not caused by an error from the user but is due to SET DISPLAY MODE only allowing a maximum resolution of the screen resolution and not the maximum resolution supported by the user's hardware.
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