Hi,
I've just updated libfreetype6 and lib64freetype6 and the fonts are gone blurry. Only GTK applications are affected as far as I can see (FF 10 and Control Center for example). I am not able to fix anything using standard KDE System Settings tools. Fonts AA is enabled, forced 96DPI, subpixel rendering rgb (changing doesn't help), slight hinting (changing doesn't help).
I'll try to roll back to the previous version.