Created attachment 480449 [details] Screenshot of the score with DW enabled Build : Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0b7pre) Gecko/20101002 Firefox/4.0b7pre The score of this football match is displayed with a big font. With DW enabled, the upper spacing is higher than without it.
Yes, directwrite reports slightly different font metrics than GDI does. It also draws the fonts slightly differently. What's the bug?
It appears 'Bolder' is specified twice here (for .scx and .sc1), for the Arial Family. DirectWrite will find Arial Black here (which is a bolder font face than just Arial Bold). GDI didn't find this font. The page seems to rely on the incorrect GDI behavior.
Ah, good catch.