http://i.imgur.com/9aMEcgb.png
# Shadow
shadow = true; # Enabled client-side shadows on windows.
no-dock-shadow = true; # Avoid drawing shadows on dock/panel windows.
no-dnd-shadow = true; # Don't draw shadows on DND windows.
#clear-shadow = true; # Zero the part of the shadow's mask behind the
# window. Fix some weirdness with ARGB windows.
shadow-radius = 7; # The blur radius for shadows. (default 12)
shadow-offset-x = -10; # The left offset for shadows. (default -15)
shadow-offset-y = -10; # The top offset for shadows. (default -15)
# shadow-opacity = 0.7; # The translucency for shadows. (default .75)
# shadow-red = 0.0; # Red color value of shadow. (0.0 - 1.0, defaults to 0)
# shadow-green = 0.0; # Green color value of shadow. (0.0 - 1.0, defaults to 0)
# shadow-blue = 0.0; # Blue color value of shadow. (0.0 - 1.0, defaults to 0)
shadow-exclude = [ "n:e:Notification" ]; # Exclude conditions for shadows.
# shadow-exclude = "n:e:Notification";
# shadow-exclude = [ "_GTK_FRAME_EXTENTS@:c" ] # Fix dual shadow on some gtk3 powered applications
#shadow-ignore-shaped = true; # Avoid drawing shadow on all shaped windows
# (see also: --detect-rounded-corners)
Так с gnome-disk-utils и gedit — подозреваю, что виноват GTK3. Как лечить? Да, я знаю, что GTK3 не нужен. Тем не менее.