From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; pl-PL; rv:1.1) Gecko/20020826

Description of problem:
gnome-panel application crashes with "fatal error" message during XWindow+GNOME
startup after some customization of settings done 

Version-Release number of selected component (if applicable):
gnome-panel-2.0.6-9

How reproducible:
Sometimes

Steps to Reproduce:
Problem happens every time I start XWindow with GNOME, but supposly there is no
easy way to reproduce this problem in another system. That's why I choose
"Sometimes" option. It started to happen after I little bit customized
gnome-panel settings - content, behavior and screen placement. Moreover, it
happened for the first time after restarting XWindow, not during gnome-panel
configuration.

Shortly speaking, what I did is:

1. Customized gnome-panel settings. 
2. Closed XWindow session and started it again.

Then found the problem.

	

Actual Results:  I get message window, that you'll find in URL included.


Expected Results:  gnome-panel running properly

Additional info:

Some investigation on X server logs gave me following error message, that can be
useful:

system-tray-applet-ERROR **: file obox.c: line 107 (get_class): should not be
reached
aborting...