$ gnome-about --gnome-version
Version: 2.30.2
Distributor: Ubuntu
Build Date: 06/25/2010

~/.gtkrc-2.0 file content:
style "my_panel"
{
font_name = "bold"
}

widget "*slab-main-menu-window*" style "my_panel"
widget "*PanelWidget*" style "my_panel"
widget "*PanelApplet*" style "my_panel"