Unexpected behaviour with Sass nested selectors.

gistfile1.scss

@mixin mini-link-reset {
    &, &:hover, &:focus, &:active, &:visited {
        color: inherit;
        text-decoration: none;
    }
}

a {
    @include mini-link-reset;    
    color: red; /* Whoa, buddy, how did you get up there? */
}