High contrast window border

I don't know if it is a bug or on purpose, but i noticed that there is no shadow around guake's window frame.. for me that's very annoying! Because of hours of welding in my past i have a slight contrast problem with my eyes and i sometimes can't see the edge of a window. That's why i hate flat themes!! :( I need my borders and shadows to see the depth! Is there a way to get at least a shadow?