We encoutered this bug just a few moments ago (Firefox 3.5.9 on karmic).
Before, we had played around with Gnome font settings and "systemsettings" (a KDE system settings application; we wanted to give KDE applications the GTK+ style).
Some time later we realized that Firefox and Thunderbird (3.0.4) did not use sub-pixel rendering, it seemed more like the normal font smoothing. Other GTK applications (like Nautilus) behaved like set in the font settings.
Changing the settings and back to sub-pixel did not help, neither did restarting X.
We removed ~/.fonts.conf and ~/.fontconfig and after logging out and back in everything was back to normal.
Hope this helps.
(You may not want remove ~/.fonts as you could have some custom fonts in there).
We encoutered this bug just a few moments ago (Firefox 3.5.9 on karmic).
Before, we had played around with Gnome font settings and "systemsettings" (a KDE system settings application; we wanted to give KDE applications the GTK+ style).
Some time later we realized that Firefox and Thunderbird (3.0.4) did not use sub-pixel rendering, it seemed more like the normal font smoothing. Other GTK applications (like Nautilus) behaved like set in the font settings.
Changing the settings and back to sub-pixel did not help, neither did restarting X.
We removed ~/.fonts.conf and ~/.fontconfig and after logging out and back in everything was back to normal.
Hope this helps.
(You may not want remove ~/.fonts as you could have some custom fonts in there).