No stock icon in menu with glade 3.5.5 and 3.5.6

[Marco Rocco <mr85mr gmail com>]

Hi to all,
i have a this problem: I don't view the icon of menu (stock icon) with 
the gui created with new glade 3.5.6 (or also 3.5.5).
I have seen the differences between the previous glade file and new: the 
main important different is that with new glade in xml there isn't this 
line: <property name="use_stock">True</property>, into <widget 
class="GtkImageMenuItem" id="">.

It's a Glade's Bug ?

i have attached to this mail two images to see you the differences.