[arch-general] Shutdown Issue

Hi I am using Gnome 2.28, and added the shutdown item to the panel. While using the shutdown button from the panel, the screen garbles up, and i don't see the normal shutdown messages, but the computer still shuts down normally. nothing is logged related to this. While using any other shutdown method (console, or even system -> shutdown), all the shutdown messages are displayed (the daemons switching off, etc) and the computer shuts down normally. I would like to know, what script does that button call, that probably leads to the above issue.