glade crashes on top level widget creation

[Sayori]

I am trying to create top level widget, but glade crashes at the same time with the following message:
GladeUI-Message: 2 missing displayable value for GtkWidget::events
GladeUI-Message: No displayable values for property GtkTreeSelection::mode
GladeUI-Message: 1 missing displayable value for GtkCellRendererAccel::accel-mode
GladeUI-Message: 14 missing displayable value for GtkCellRendererAccel::accel-mods

(glade:2654): Gtk-CRITICAL **: gtk_css_section_get_file: assertion `section != NULL' failed

(glade:2654): Gtk-CRITICAL **: gtk_css_section_get_end_position: assertion `section != NULL' failed

(glade:2654): Gtk-CRITICAL **: gtk_css_section_get_end_line: assertion `section != NULL' failed

(glade:2654): Gtk-WARNING **: Theme parsing error: <data>:1:0: Unknown value 'GTK_SHADOW_NONE' for enum type 'GtkShadowType'
Segmentation fault(memory dump saved)

DistroRelease: Kubuntu 12.04
Package: glade 3.12.1-0ubuntu1