you did a screenshot of the game in a maximized window. In such case, you have to manually set the window size to be of a 4:3 ratio (or you can use the in-game display menu as well) .
In real fullscreen, you have to configure your display driver in such a way that it will force a 4:3 ratio for 4:3 all resolutions ; for example, setting the display to 1024x768 will add some black bars on the left and right of the screen to display the correct ratio.
You'll have the same problem with all older games, and 2D games, and you'll need the same solution to correct that...
== Mana Games ==
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