Many of the Windows fonts have some special "Font Hinting" built in, which specifies how to exactly render the font in small sizes. This is important for system

Many of the Windows fonts have some special "Font Hinting" built in, which specifies how to exactly render the font in small sizes. This is important for systems, where there is no automatic Anti Aliasing in place. http://en.wikipedia.org/wiki/Font_hinting http://en.wikipedia.org/wiki/Font_hinting Creating such a Font Hinting is, from my understanding, quite a tedious task and became unnecessary for newer systems. Most fonts that don't come along with Windows, simply don't have this hinting built in anymore.