could be an useful bump:
if someone's using the aurora or nightly channel, there's new option in about:config that allows you to use standard font rendering while using directwrite hardware acceleration (that means awesomeness = no ugly fonts anymore)
search for gfx.font_rendering.cleartype_params.rendering_mode and swich to value "2" - or you can also try values 3 and 4, maybe for someone it will be better, but 2 is same rendering as GDI