I'm using the MediterraneanNight theme (http://gnome-look.org/content/show.php?content=148398&forumpage=1) and the menu items in some context menus have the wrong background color. For example, when i'm in Eclipse, I select "Project" and the menu items are light gray and their background color is also light gray. How do i fix this?
I came across the same issue, but I couldn't find any real solution (how could there be any, if simply the theme doesn't support Eclipse, and Eclipse doesn't support the theme), so I simply searched for a dark theme for Eclipse, and found one looking good named Dark Juno.
You can find the theme, and installation instructions on GitHub:
The readme includes rough instructions for setting a dark editor colour scheme as well. I hope it helps, the result satisfied me.