Comment 6 for bug 660420

Bruno: yup, with four pixels for the x-height you end up with both halves of the double-storey adjacent to each other (leaving the third-pixel of the four for the whitespace within the main bowl).

I think what the original poster is getting at, is that we should actually /try/ to make a special effort at the really small sizes, rather than just dismissing them as hard/not possible.

Admittedly without the pixel count it just won't be possible to be particularly stylistic, and most tiny fonts will tend towards each other: since there's only so many ways that something can remain readable.