First of, stop using portato.
Second, you are installing the wrong version of compiz-fusion. You should be installing version 9999
and you are installing version 0.5.2.
This is wrong.
Third, you shouldn't be enabling all of those USE flags. If you are using KDE only then you shouldn't be enabling the GNOME use flags.
Can you type emerge -pv compiz
into a konsole and report back as to what it says.