Once booted the desktop is fine using the AMD fglrx drivers since I can set the overscan to 0 using the catalyst control center. I don't get the 1 inch border around the screen once booted.
However I have never been able to get grub selection or the boot screen to fit the screen fully when using the propriety drivers.
I have had this issue on 12.10 and now running 13.10 beta2 with the same issue. There must be an easy way to tell grub and the boot mode to over/under scan = 0 before the fglrx driver kicks in ?