I installed last stable Catalyst 14.4 from official site amd.com.
I use HDMI. By default, with HDMI connections the screen is compressed. To fix problem should go to CCC - DTV(1) - Adjustment - Scale Settings and set scrollbar on 0%. That need to be done the same on Linux and Windows versions Catalyst with HDMI connections. Generally I sure that compressed screen with HDMI connections by default is not right and not friendly to user.
But in Linux Catalyst that options (CCC - DTV(1) - Adjustment - Scale Settings and set scrollbar on 0%) is absent.
In Catalyst from official repository this ability is on place. To set normal size of screen I was forced to remove fglrx-amdcccle from site (14.4) and install one from official repositories Ubuntu 14.04. Now I have fglrx from site (14.4) + fglrx-amdcccle from official repositories.
See screenshot in attachment.