this bug is still present in Ubuntu 14.04
$ xchat-gnome Gtk-Message: Failed to load module "unity-gtk-module"
(xchat-gnome:16563): Gtk-WARNING **: Unknown property: TopicLabel.creation-function
(xchat-gnome:16563): Gtk-WARNING **: Unknown property: ConversationPanel.creation-function
(xchat-gnome:16563): Gtk-WARNING **: Unknown property: TextEntry.creation-function
(xchat-gnome:16563): Gtk-WARNING **: Unknown property: FindBar.creation-function
(xchat-gnome:16563): Gtk-WARNING **: Unknown property: StatusBar.creation-function
(xchat-gnome:16563): Gtk-CRITICAL **: IA__gtk_widget_set_sensitive: assertion 'GTK_IS_WIDGET (widget)' failed
this bug is still present in Ubuntu 14.04
$ xchat-gnome
Gtk-Message: Failed to load module "unity-gtk-module"
(xchat- gnome:16563) : Gtk-WARNING **: Unknown property: TopicLabel. creation- function
(xchat- gnome:16563) : Gtk-WARNING **: Unknown property: ConversationPan el.creation- function
(xchat- gnome:16563) : Gtk-WARNING **: Unknown property: TextEntry. creation- function
(xchat- gnome:16563) : Gtk-WARNING **: Unknown property: FindBar. creation- function
(xchat- gnome:16563) : Gtk-WARNING **: Unknown property: StatusBar. creation- function
(xchat- gnome:16563) : Gtk-CRITICAL **: IA__gtk_ widget_ set_sensitive: assertion 'GTK_IS_WIDGET (widget)' failed
(xchat- gnome:16563) : Gtk-CRITICAL **: IA__gtk_ widget_ set_sensitive: assertion 'GTK_IS_WIDGET (widget)' failed