Left-over comment * or CSS Hack :: Invalid CSS

While it is common CSS Hack to apply the property value in IE 7 and below it is not recommended. In this instance there is no change. Zoom: 1; most likely fixes an error in IE 7 and below, but it means zoom: 100% which is the default zoom value.
Merge pull request #63 from MDooley47/patch-3

Left-over comment * or CSS Hack :: Invalid CSS