I've upgraded from 11.10 to 12.04. I was using Gnome-Shell in 11.10 and still am on the current install.
I've noticed an inconsistency between the themes of applications - some appear black whilst others appear white, like this:
Nautilus is appearing in the white theme, whilst Movie Player is in black.
Adwaita is the theme that's selected for the GTK+ and Window themes.
If you look at the Ambiance theme, the theme-ing of nautilus requires a separate
.css
file or specific theming. Look at/usr/share/themes/Ambiance/gtk-3.0/apps/nautilus.css
to see it.You would need to copy that and correct the values for Adwaita.
Not all themes being completely converted for all the special cases with Gtk3 is probably why they are disabled by default.
Edit: I took a look at Adwaita and it's movie player that's not conforming. I had it backwards, but the point remains the same. You can add a
totem.css
to correct it.