"Google Toggle: Left NavBar" transparency problem with Mozilla and Opera.

[JJoe]

The toggled div, prox-nav, isn't hiding the elements behind it.

  transparentb.png (Size: 58.55 KB / Downloads: 968)

To compensate I have added a z-index statement to google-css-alt.css.

Before

Code:

/* Fix borders for LeftNav toggle */
div.prox-nav {
  border-width: 0 1px 1px 0;
  border-style: solid;
  border-color: black;
}

After

Code:

/* Fix borders for LeftNav toggle */
div.prox-nav {
  border-width: 0 1px 1px 0;
  border-style: solid;
  border-color: black;
  z-index:1;
}

Any complaints or better (I'm not a css expert) solutions?