strang in shutdown

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http://forums.opensuse.org – hi i am using OpenSUSE 11.1.till now its cool except.it is failing to shutting down.i use GNOME as my desktop.and user is root.when i am clicking on computer->shutdown its besically loging out.after that i need to shudown it by from menu. if i try init 0 on command prompt its shutting down the system.what to do?how to fix it? (Distributions)