Run the current FC6test3 install DVD. When configuring ethernet, select a static IP and uncheck the IPv6 box (most people won't want IPv6). Type in IP, hit okay. Even though IPv6 checkbox is disabled and field is dim, you get a message complaining that IPv6 address has not been supplied. While fixing this, any chance of *labeling* the netmask boxes? Their purpose isn't immediately obvious.
Fixed in rawhide, boxes are labeled in rawhide. *** This bug has been marked as a duplicate of 206148 ***