Glade errors

When I try to run Glade I get the following errors. What seems to be the problem?

GladeUI-Message: No displayable values for property GtkScaleButton::size
GladeUI-Message: No displayable values for property GtkImage::icon-size

(glade-3:7967): GladeUI-WARNING **: No icon named 'widget-gtk-sizegroup' was found for object class 'GtkSizeGroup'.

(glade-3:7967): GladeUI-WARNING **: No icon named 'widget-gtk-accelgroup' was found for object class 'GtkAccelGroup'.

(glade-3:7967): GladeUI-WARNING **: No icon named 'widget-gtk-adjustment' was found for object class 'GtkAdjustment'.

(glade-3:7967): GladeUI-WARNING **: No icon named 'widget-gtk-uimanager' was found for object class 'GtkUIManager'.

(glade-3:7967): GladeUI-WARNING **: No icon named 'widget-gtk-treemodelfilter' was found for object class 'GtkTreeModelFilter'.

(glade-3:7967): GladeUI-WARNING **: No icon named 'widget-gtk-treemodelsort' was found for object class 'GtkTreeModelSort'.

(glade-3:7967): GladeUI-WARNING **: No icon named 'widget-gtk-treeselection' was found for object class 'GtkTreeSelection'.

(glade-3:7967): GladeUI-WARNING **: No icon named 'widget-gtk-statusicon' was found for object class 'GtkStatusIcon'.

(glade-3:7967): GladeUI-WARNING **: No icon named 'widget-gtk-textbuffer' was found for object class 'GtkTextBuffer'.

(glade-3:7967): GladeUI-WARNING **: No icon named 'widget-gtk-texttag' was found for object class 'GtkTextTag'.
GladeUI-Message: No displayable values for property GtkTextTag::direction

(glade-3:7967): GladeUI-WARNING **: No icon named 'widget-gtk-texttagtable' was found for object class 'GtkTextTagTable'.

(glade-3:7967): GladeUI-WARNING **: No icon named 'widget-gtk-filefilter' was found for object class 'GtkFileFilter'.
GladeUI-Message: 1 missing displayable value for GnomeDateEdit::dateedit-flags
GladeUI-Message: No displayable values for property GnomeIconList::selection-mode

(glade-3:7967): GladeUI-CRITICAL **: Unable to load module 'vte' from any search paths

(glade-3:7967): GladeUI-WARNING **: Failed to load external library 'vte'

(glade-3:7967): GladeUI-WARNING **: Incapaz de encontrar o símbolo "vte_terminal_get_type"

(glade-3:7967): GladeUI-WARNING **: Incapaz de obter o tipo de "VteTerminal"

(glade-3:7967): GladeUI-WARNING **: Failed to load the GType for 'VteTerminal'

(glade-3:7967): GladeUI-WARNING **: Tried to include undefined widget class 'VteTerminal' in a widget group

(glade-3:7967): GladeUI-WARNING **: No icon named 'widget-gnome-media-profiles-audio-profile-edit' was found for object class 'GMAudioProfileEdit'.

(glade-3:7967): GladeUI-WARNING **: No icon named 'widget-gnome-media-profiles-audio-profile-choose' was found for object class 'GMAudioProfileChoose'.

(glade-3:7967): GladeUI-CRITICAL **: Unable to load module 'gtksourceview-2.0' from any search paths

(glade-3:7967): GladeUI-WARNING **: Failed to load external library 'gtksourceview-2.0'

(glade-3:7967): GladeUI-WARNING **: Incapaz de encontrar o símbolo "gtk_source_view_get_type"

(glade-3:7967): GladeUI-WARNING **: Incapaz de obter o tipo de "GtkSourceView"

(glade-3:7967): GladeUI-WARNING **: Failed to load the GType for 'GtkSourceView'

(glade-3:7967): GladeUI-WARNING **: Tried to include undefined widget class 'GtkSourceView' in a widget group

(glade-3:7967): GLib-GObject-WARNING **: /build/buildd/glib2.0-2.26.0/gobject/gsignal.c:2275: signal `delete' is invalid for instance `0x1b24a20'

(glade-3:7967): GLib-GObject-WARNING **: /build/buildd/glib2.0-2.26.0/gobject/gsignal.c:2275: signal `delete' is invalid for instance `0x1d4ae10'