I have a bug which I *think* is the same as this. I have an amd64
Maverick system running yelp 2.30.1-0ubuntu1, and when I run yelp I get
the following to stderr:

(yelp:4672): Gtk-CRITICAL **: IA__gtk_tool_button_new: assertion
`icon_widget == NULL || GTK_IS_MISC (icon_widget)' failed

(yelp:4672): GLib-GObject-WARNING **: invalid (NULL) pointer instance

(yelp:4672): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion
`G_TYPE_CHECK_INSTANCE (instance)' failed

(yelp:4672): Gtk-CRITICAL **: IA__gtk_toolbar_insert: assertion
`GTK_IS_TOOL_ITEM (item)' failed

(yelp:4672): Gtk-CRITICAL **: IA__gtk_tool_button_new: assertion
`icon_widget == NULL || GTK_IS_MISC (icon_widget)' failed

(yelp:4672): GLib-GObject-WARNING **: invalid (NULL) pointer instance

(yelp:4672): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion
`G_TYPE_CHECK_INSTANCE (instance)' failed

(yelp:4672): Gtk-CRITICAL **: IA__gtk_toolbar_insert: assertion 
`GTK_IS_TOOL_ITEM (item)' failed
Segmentation fault

A window flashes momentarily on the screen. I created a backtrace with
the command

strace yelp &> yelp.strace

and I am attaching that file. If that is satisfactory (and this is
really the same bug), then I will submit the trace upstream at
https://bugzilla.gnome.org/show_bug.cgi?id=633442. However, I did not
follow the instructions at http://live.gnome.org/GettingTraces for
getting the debug symbols. I would be pleased to do that, if it is
necessary in this case. Please advise.

** Attachment added: "possibly unsatisfactory backtrace"
   
https://bugs.launchpad.net/ubuntu/+source/yelp/+bug/668175/+attachment/1756703/+files/yelp.strace

** Tags added: amd64

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https://bugs.launchpad.net/bugs/668175

Title:
  yelp crashed with Gtk-Critical in yelp:3398

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