pessoal, alguém tem um tutorial para fazer a instalação do compiz-fusion?

segui o tutorial do gentoo-wiki e não deu certo. quando eu tento 'rodar' o compiz, da esse erro:

seba@seireitei ~ $ compiz-start
AIGLX detected
Using GTK decorator

(gtk-window-decorator:8806): Gdk-WARNING **: Using Cairo rendering requires the drawable argument to
have a specified colormap. All windows have a colormap,
however, pixmaps only have colormap by default if they
were created with a non-NULL window argument. Otherwise
a colormap must be set on them with gdk_drawable_set_colormap

(gtk-window-decorator:8806): Gdk-CRITICAL **: gdk_cairo_create: assertion `GDK_IS_DRAWABLE (drawable)' failed
compiz (core) - Fatal: No composite extension

alguma dica do que posso fazer pra corrigir esse problema?

--
Sebastian SWC
http://sebastianswc.com
http://www.postgresql.org.br/