Menu doesn't show properly when used in a list item

[SandiCat]

li [ content [ text "test"], Menu.render ...]

As you can see, when used within a list item (as an icon would be, in the demo), the Menu displays only a very small portion of itself (the white rectangle in the picture), as if it was capped within the rectangle of the list item. Removing some position: relative property in the internal CSS fixes it, but then it doesn't show up next to the button.