there is an interesting patch for radeon driver that will go soon in head (at least I hope so!) and fixes many annoying font rendering glitches; you can find it here: https://bugs.freedesktop.org/show_bug.cgi?id=1424
Created attachment 57006 [details, diff] radeon_R100_RV200_font_rendering_fix.patch xorg HEAD patch (path changed, it can be added to xorg-x11-6.8.99.3-patches-0.1.1.tar.bz2)
Created attachment 57007 [details, diff] xft_crash_when_passing_FT_Face_objcts_fix.patch unrelated, but this patch wasn't yet included 3 days ago. See bug #85153
Please reopen this bug when it's committed upstream and I'll be happy to add it.