Glx-Dock / Cairo-Dock

warning : (/home/ppmt/cairo-dock_bzr/cairo-dock-core/src/gldit/cairo-dock-applications-manager.c:cairo_dock_create_surface_from_xpixmap:1175)
No thumbnail available.
Either the WM doesn't support this functionnality, or the window was minimized when the dock has been launched.
cairo_dock_register_class_full ((null), thunderbird, Thunderbird)
cairo_dock_guess_class ((null), 'thunderbird')
-> 'thunderbird'
warning : (/home/ppmt/cairo-dock_bzr/cairo-dock-core/src/gldit/cairo-dock-applications-manager.c:cairo_dock_create_surface_from_xpixmap:1175)
No thumbnail available.
Either the WM doesn't support this functionnality, or the window was minimized when the dock has been launched.
cairo_dock_register_class_full ((null), gnome-terminal, Gnome-terminal)
cairo_dock_guess_class ((null), 'gnome-terminal')
-> 'gnome-terminal'
cairo_dock_register_class_full ((null), gnome-terminal, Gnome-terminal)
cairo_dock_guess_class ((null), 'gnome-terminal')
-> 'gnome-terminal'
_get_prefered_wmc ((null), 0)
_get_prefered_wmfb ((null), 0)
Metacity (1)
***** WM: Compiz / Metacity