I confirm this problem. For me it happened with all DejaVu fonts. Specifically, the font rendering engine did not seem to use hints; for example, the vertical bars of the letters were no longer aligned with screen pixels and the result was hard-to-read and blurry (and, in many cases, the fonts looked bolder than usually). Worked fine in Kubuntu 6.06, broke when I updated (with apt-get) to Kubuntu 6.10.
Changing the hinting level in the KDE font settings from medium to full indeed solves the problem. However, I would like to emphasise that the medium level used to be the default setting; thus, I think a large number of users have ~/.fonts.conf files with settings that used to work but no longer work. I wonder if all of them can figure out how to fix the problem. The same thing happened in Debian earlier, see the following bug report for more information: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=367964 -- [edgy] extremely bold ttf fonts in kubuntu (edgy) https://launchpad.net/bugs/61331 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs