Form on Ubuntu won't work on gtk2

I just installed gnue on ubuntu8.04 and attempted to access my database 
with a form that is similar to the first example given in the Forms 
Developer's Guide. It runs in curses fine but in gtk2 it gives 
AttributeError: 'GFLayout' object has no attribute 'Char__width'. Is 
this a dependency problem or is the Developers Guide in error or am  I 
just missing something? The full error and my form definition are given 
below.

This form accesses the info. in one of many tables in a postgresql 
database that I have maintained over the years with GNUE. The forms were 
developed with designer and I am going to either  write new forms from 
scratch without designer or alter the current forms so that they can 
work with present GNUE. There is no relational stuff in the database at 
this time but I would like to extend it to invoicing, etc.

Any help would be appreciated.

Kenneth D. Reiszner
P.O. Box 709,    41 hwy 167 S. (UPS, etc)
Lecompte, LA 71346

Ph.No.: 318-443-0426

 Form definition:
<?xml version="1.0"?>
<form title="Keys2">
  <datasource name="dts_keys" connection="real" table="keys2">
    <sortorder>
      <sortfield name="item" ignorecase="Y"/>
      <sortfield name="combination_o__key" ignorecase="Y"/>     
    </sortorder>
  </datasource>
  <logic>
    <block name="blk_keys" datasource="dts_keys">
      <field name="item" field="item" datatype="text" length="50"/>
      <field name="key" field="combination_o__key" datatype="text" 
length="255"/>
    </block>
  </logic>
  <layout>
    <page name="pg_keys" caption="Keys">
      <vbox name="box" block="blk_keys">
        <entry name="item" field="item" label="Item:"/>
    <entry name="key" field="key" label="Key:"/>
      </vbox>
    </page>
  </layout>
</form>


The full error:

Traceback (most recent call last):
   File "/usr/bin/gnue-forms", line 34, in <module>
    client.run ()
   File "/var/lib/python-support/python2.5/gnue/forms/GFClient.py", line 
197, in run
    instance.run_from_file(formfile, userParameters)
   File "/var/lib/python-support/python2.5/gnue/forms/GFInstance.py", 
line 276, in run_from_file
    self.__run(form, parameters)
   File "/var/lib/python-support/python2.5/gnue/forms/GFInstance.py", 
line 365, in __run
    form.initialize(self.__default_form)
   File "/var/lib/python-support/python2.5/gnue/forms/GFForm.py", line 
320, in initialize
    self.phaseInit()
   File 
"/var/lib/python-support/python2.5/gnue/common/definitions/GObjects.py", 
line 163, in phaseInit
    self._phaseInit (phase)
   File 
"/var/lib/python-support/python2.5/gnue/common/definitions/GObjects.py", 
line 335, in _phaseInit
    inits [phase] ()
   File "/var/lib/python-support/python2.5/gnue/forms/GFForm.py", line 
385, in phase_3_init
    self._instance._uiinstance.buildForm(self, self.name)
   File 
"/var/lib/python-support/python2.5/gnue/forms/uidrivers/_base/UIdriver.py", 
line 233, in buildForm
    self._gfObjToUIWidget [form].phaseInit ()
   File 
"/var/lib/python-support/python2.5/gnue/common/definitions/GObjects.py", 
line 163, in phaseInit
    self._phaseInit (phase)
   File 
"/var/lib/python-support/python2.5/gnue/common/definitions/GObjects.py", 
line 335, in _phaseInit
    inits [phase] ()
   File 
"/var/lib/python-support/python2.5/gnue/forms/uidrivers/_base/widgets/_base.py", 
line 179, in __primary_init
    widget = self.create_widget(self._creationEvent, spacer)
   File 
"/var/lib/python-support/python2.5/gnue/forms/uidrivers/_base/widgets/_base.py", 
line 210, in create_widget
    return self._create_widget_(event, spacer)
   File 
"/var/lib/python-support/python2.5/gnue/forms/uidrivers/gtk2/widgets/_base.py", 
line 64, in _create_widget_
    newWidget = self._create_widget (event, spacer)
   File 
"/var/lib/python-support/python2.5/gnue/forms/uidrivers/gtk2/widgets/form/widget.py", 
line 78, in _create_widget
    formWidth  = int (self._form._layout.Char__width)
 AttributeError: 'GFLayout' object has no attribute 'Char__width'

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