(process:2437): GLib-CRITICAL **: g_slice_set_config: assertion `sys_page_size == 0' failed
(process:2547): GLib-CRITICAL **: g_slice_set_config: assertion `sys_page_size == 0' failed
(process:3280): GLib-CRITICAL **: g_slice_set_config: assertion `sys_page_size == 0' failed
(spotify:3308): GLib-GObject-WARNING **: invalid cast from `GtkFixed' to `GtkBox'
(spotify:3308): Gtk-CRITICAL **: gtk_box_pack: assertion `GTK_IS_BOX (box)' failed
(spotify:3308): GLib-GObject-WARNING **: invalid cast from `GtkFixed' to `GtkBox'
(spotify:3308): Gtk-CRITICAL **: gtk_box_pack: assertion `GTK_IS_BOX (box)' failed
(spotify:3308): GLib-GObject-WARNING **: invalid cast from `GtkFixed' to `GtkBox'
(spotify:3308): Gtk-CRITICAL **: gtk_box_pack: assertion `GTK_IS_BOX (box)' failed
(spotify:3308): GLib-GObject-WARNING **: invalid cast from `GtkFixed' to `GtkBox'
(spotify:3308): Gtk-CRITICAL **: gtk_box_pack: assertion `GTK_IS_BOX (box)' failed
(spotify:3308): Gdk-CRITICAL **: IA__gdk_window_set_cursor: assertion `GDK_IS_WINDOW (window)' failed
(spotify:3308): GLib-GObject-WARNING **: invalid cast from `GtkFixed' to `GtkBox'
(spotify:3308): Gtk-CRITICAL **: gtk_box_pack: assertion `GTK_IS_BOX (box)' failed
(spotify:3308): GLib-GObject-WARNING **: invalid cast from `GtkFixed' to `GtkBox'
(spotify:3308): Gtk-CRITICAL **: gtk_box_pack: assertion `GTK_IS_BOX (box)' failed
(polkit-gnome-authentication-agent-1:1886): GLib-WARNING **: GChildWatchSource: Exit status of a child process was requested but ECHILD was received by waitpid(). Most likely the process is ignoring SIGCHLD, or some other thread is invoking waitpid() with a nonpositive first argument; either behavior can break applications that use g_child_watch_add()/g_spawn_sync() either directly or indirectly.
gnome-session[1759]: WARNING: Application 'compiz.desktop' killed by signal 11
gnome-session[1759]: WARNING: App 'compiz.desktop' respawning too quickly
gnome-session[1759]: CRITICAL: We failed, but the fail whale is dead. Sorry....