After last updates of fontconfig, OOo and Xorg the issue is less obvious, retreats a little bit but it's still present. Fonts in UI are fine now (for me) but ithere are still some artifacts on some fonts on canvas, especially big letters, naturally big or when zoom is used, again often r letter, but not all r letters, sometimes forced repaint helps, sometimes not.
-- Font rendering glitches with radeon, known bug, patch exists https://launchpad.net/bugs/62537 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs