This time aspect ratio correction and GDI video driver have been fixed for “non-power-of-two” resolutions like the infamous 1366×768 on some laptops.
Aspect ratio recalculation adjusts for mismatch between game resolution and maximum display resolution. For example, 640×480 (4:3) on a 1920×1080 (16:9) display. The max is usually native resolution on a laptop.
The power-of-two issue is a quirk of direct screen blitting in windows, the GDI driver. Display resolutions that are not divisible by 4 will normally shear. This update hacks that by padding the blit image to overcome the restriction.