I noticed this in a matchbox environment, where there's no gnome-setting-daemon running. The problem is only with the scrollbars, because we initialize the GtkSettings in RenderThemeGtk and notify the ScrollbarTheme when it changes, but ScrollbarTheme is created before RenderThemeGtk so we initialize the theme properties before the GtkSettings have been initialized. We could just let the ScrollbarTheme monitor the theme itself instead of relying on being notified by the WebCore layer.
Created attachment 270648 [details]
Committed r196171: <http://trac.webkit.org/changeset/196171>