Very often, when I open a menu (e.g. by right-clicking in Nautilus), it doesn't display the blue "selected" background at all, or only displays it on the first item – even if I move the selection with arrow keys or mouse, the selected menu item doesn't become blue.

This is merely annoying when using the mouse, but makes the menu especially hard to use with keyboard.

This seems to happen randomly, about half of the time... although it seems to be much more frequent with the empty-area right-click menu in nautilus, and rare with the file right-click menu.

gtk 3.7.10-71-gf4e5d98
gnome-shell 3.7.90-30-gfb0cf64
mutter 3.7.90-2-g2cafb8b