I do not like full-dark themes in Lubuntu, but I like dark menus.
In Lubuntu 12.04 was using one theme that was called Mediteranean Ligh if I remember well that was like that.
A similar question got an answer that indicated a new Ambiance theme with dark menus. (At some point I used Ambiance and Clearlooks with dark menus, I think, but cannot find them anymore.)
But after upgrading to 12.10 these themes with dark menus began displaying some incorrect white background under fonts on certain menus and buttons. Like this, in the network settings:
or on the buttons of Synaptic
while the main menus and most other menus were ok, dark, as supposed to be.
This happens when I use my older darked-menus theme MediterraneanLight, or the theme recommended in the answer to the question mentioned (AmbianceOneiric-Master).
(This question here is Lubuntu-specific. Therefore, please do not flag it as duplicate of others here that ask about having back the dark menus of the Ambiance theme: all these questions have been closed as duplicate of this one, already mentioned, which is Gnome/Unity-specific, and the AmbianceOneiric-Master theme indicated as answer would not work in Lubuntu 12.10.)
What to do?