After complete system reinstall, and selecting fglrx from Driver Manager (instead of manually installing from http://support.amd.com/en-us/download/desktop?os=Linux%20x86_64) I have no problems. No need for manual install.
Still keyword search in gnu-manager SHOULD search label "Driver" from beginning of the line... => the bug is not critical.
After complete system reinstall, and selecting fglrx from Driver Manager (instead of manually installing from http:// support. amd.com/ en-us/download/ desktop? os=Linux% 20x86_64) I have no problems. No need for manual install.
Still keyword search in gnu-manager SHOULD search label "Driver" from beginning of the line... => the bug is not critical.