This is obviously a bug in GTK, since we can't have custom transparent widgets in menuitems. This problem can be seen in many other places (ubuntu's sound menu for instance) and is solved by using background-color instead of background-image to theme menus.
This is obviously a bug in GTK, since we can't have custom transparent widgets in menuitems. This problem can be seen in many other places (ubuntu's sound menu for instance) and is solved by using background-color instead of background-image to theme menus.