HowTo Install:

% sudo apt-get install subversion libqt4-webkit libqt4-dev g++
% svn co https://cutycapt.svn.sourceforge.net/svnroot/cutycapt
% cd cutycapt/CutyCapt
% qmake
% make

HowTo Use:
% ./CutyCapt --url=http://www.example.org --out=example.png