Cairo-dock: less maximaization space, screen sometimes garbled

Hello.

When I use cairo-dock with sawfish, I notice these two problems:

* Windows don't maximize as much as when cairo-dock is not running: my
cairo-dock is on the left of the screen, and maximized windows leave about
1/3 ot the left part of the screen empty;

* When clicking on a sub-dock in cairo-dock, sometimes a black rectangle
with the icon in this subdock appear at the topmost leftmost position of
the screen. This is not a window, it looks liker some off-screen drawing
that should'nt appear...

This is on Gentoo, on a machine with an Intel GM965 chipset; I use the
latest sawfish and cairo-dock.

-- 
Fabrice DELENTE