Yes, I just tested, I have the same problem with Glade 3.4.5 on Hardy.
BTW, to fix the flawed XML that was generated, I had to delete both:
<property name="label" translatable="yes">menuitemHaha</property>
and
<property name="use_underline">True</property>
Yes, I just tested, I have the same problem with Glade 3.4.5 on Hardy. "yes">menuitemH aha</property> underline" >True</ property>
BTW, to fix the flawed XML that was generated, I had to delete both:
<property name="label" translatable=
and
<property name="use_