Link colors

So if I choose a dark Header image, the menu-text is in white and looks good. I believe this color is defined in the Absolute Header Menus Color. BUT, if I choose a dark color for the Secondary Link Color, the menutext-color changes to that as well, and for some reason overrides the Absolute Header Menus Color. BUT #2, if I change the Absolute Header Menus Color to anything else than white, it again works. Surely this is a bug?