Chris: no, it's both volume/mute and display brightness keys. Original functionality for brightness is Fn+F5 brings OSD, scroll wheel controls the value. As of 10.04 Beta1, Fn+F5 brings OSD and decreases brightness, Fn+F6 brings OSD and increases brightness; scroll wheel seems to be not functional.
Chris: no, it's both volume/mute and display brightness keys. Original functionality for brightness is Fn+F5 brings OSD, scroll wheel controls the value. As of 10.04 Beta1, Fn+F5 brings OSD and decreases brightness, Fn+F6 brings OSD and increases brightness; scroll wheel seems to be not functional.