Using a Radiance derived theme in 12.04 the menu item pointed to by the mouse or selected by cycling through using the keyboard was always had a single color background and a contrasting text color (in my case, the item pointed to was white text on a blue background while other items are black text on a gray background.
After upgrading to 12.10 the unselected items are as usual but the pointed to item now has white text on a pale gray background rectangle on top of the blue background. I'm guessing that one definition in the gtkrc file has been added or split into two, but I can't immediately see which one it is.
There is a similar effect in the places bar in applications, e.g. in gedit's file open dialog box and nautilus' places bar above the window displaying the content of the folder (you can guess I don't know the correct terms for these particular features).
I'd like to have the same behaviour as I had with 12.04. Which definition needs modifying or is there a new one I need to add?