I have this bug too. I also think that this problem is due to bad interaction between gtk-window-decorator and gnome-settings-daemon.
I have changed the DPI from 125 to 96 in Settings->Appearance->Fonts->Details... All fonts change, except window title fonts.
But if I restart gtk-window-decorator the window title font size gets normal.
uname -a Linux hammy 2.6.22-14-generic #1 SMP Sun Oct 14 21:45:15 GMT 2007 x86_64 GNU/Linux
I have this bug too. I also think that this problem is due to bad interaction between gtk-window- decorator and gnome-settings- daemon.
I have changed the DPI from 125 to 96 in Settings- >Appearance- >Fonts- >Details. .. All fonts change, except window title fonts.
But if I restart gtk-window- decorator the window title font size gets normal.
uname -a
Linux hammy 2.6.22-14-generic #1 SMP Sun Oct 14 21:45:15 GMT 2007 x86_64 GNU/Linux