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> mainly the random font size

That's a consequence of the cheats that MS did a long time ago in how they render TrueType. The short version: instead of properly kerning the rendering, each glyph's x-location is rounded up to the next pixel boundary, causing nasty misalignments (some of which accumulate over the line).

The long (but very interesting version: http://www.antigrain.com/research/font_rasterization/index.h...



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