cannot export to pdf

I am using fedora package of griffith(version 0.10)
I cannot export my files to pdf or any other format. Here I am putting full log ..from startup to export-pdf. I will be very glad if you show me some way:
$ griffith --show-dep
/usr/share/griffith/lib/initialize.py:137: GtkWarning: GtkSpinButton: setting an adjustment with non-zero page size is deprecated
define_widgets(self, gtk.glade.XML(gf))
/usr/share/griffith/lib/widgets.py:355: DeprecationWarning: Use the new widget gtk.Tooltip
self.widgets['tooltips'] = gtk.Tooltips()
/usr/share/griffith/lib/widgets.py:356: DeprecationWarning: Use the new widget gtk.Tooltip
self.widgets['tooltips'].set_tip(self.widgets['preferences']['epdf_reader'], _('Define here the PDF reader you want to use within Griffith. Popular choices are xpdf, gpdf, evince or kpdf. Make sure you have this program installed and working first.'))
/usr/share/griffith/lib/widgets.py:357: DeprecationWarning: Use the new widget gtk.Tooltip
self.widgets['tooltips'].set_tip(self.widgets['preferences']['spell_lang'], _("Here you can define the desired language to use while spell checking some fields. Use you locale setting. For example, to use european portuguese spell checking enter 'pt'"))
/usr/share/griffith/lib/widgets.py:358: DeprecationWarning: Use the new widget gtk.Tooltip
self.widgets['tooltips'].set_tip(self.widgets['preferences']['mail_smtp_server'], _("Use this entry to define the SMTP server you want to use to send e-mails. On *nix systems, 'localhost' should work. Alternatively, you can use your Internet Service Provider's SMTP server address."))
/usr/share/griffith/lib/widgets.py:359: DeprecationWarning: Use the new widget gtk.Tooltip
self.widgets['tooltips'].set_tip(self.widgets['preferences']['mail_email'], _("This is the from e-mail address that should be used to all outgoing e-mail. You want to include your own e-mail address here probably."))
/usr/share/griffith/lib/widgets.py:360: DeprecationWarning: Use the new widget gtk.Tooltip
self.widgets['tooltips'].set_tip(self.widgets['preferences']['mail_smtp_port'], _("Here you can define the smtp server port to use. If you want to use your gmail account service to send e-mails, try to enter '587' here. Default (and the most common one) is '25'"))
/usr/share/griffith/lib/widgets.py:361: DeprecationWarning: Use the new widget gtk.Tooltip
self.widgets['tooltips'].set_tip(self.widgets['preferences']['mail_use_tls'], _("If you need TLS support, please check this checkbox. This is needed, for example, when using gmail service to send your reminder e-mails."))
/usr/share/griffith/lib/main_treeview.py:145: DeprecationWarning: Use the new widget gtk.Tooltip
self.widgets['tooltips'].set_tip(w['region'], self._regions[0]) # N/A
Traceback (most recent call last):
File "/usr/share/griffith/lib/griffith", line 168, in on_export_activate
module = __import__('PluginExport%s' % plugin_name)
File "/usr/share/griffith/lib/plugins/export/PluginExportPDF.py", line 43, in <module>
from plugins.export import Base
File "/usr/share/griffith/lib/plugins/export/__init__.py", line 29, in <module>
import xml.dom.ext
ImportError: No module named ext
^CTraceback (most recent call last):
File "/usr/share/griffith/lib/griffith", line 1491, in <module>
griffith.main()
File "/usr/share/griffith/lib/griffith", line 159, in main
gtk.main()
KeyboardInterrupt
[rudra@roddur ~]$ griffith --show-dep
/usr/share/griffith/lib/initialize.py:137: GtkWarning: GtkSpinButton: setting an adjustment with non-zero page size is deprecated
define_widgets(self, gtk.glade.XML(gf))
/usr/share/griffith/lib/widgets.py:355: DeprecationWarning: Use the new widget gtk.Tooltip
self.widgets['tooltips'] = gtk.Tooltips()
/usr/share/griffith/lib/widgets.py:356: DeprecationWarning: Use the new widget gtk.Tooltip
self.widgets['tooltips'].set_tip(self.widgets['preferences']['epdf_reader'], _('Define here the PDF reader you want to use within Griffith. Popular choices are xpdf, gpdf, evince or kpdf. Make sure you have this program installed and working first.'))
/usr/share/griffith/lib/widgets.py:357: DeprecationWarning: Use the new widget gtk.Tooltip
self.widgets['tooltips'].set_tip(self.widgets['preferences']['spell_lang'], _("Here you can define the desired language to use while spell checking some fields. Use you locale setting. For example, to use european portuguese spell checking enter 'pt'"))
/usr/share/griffith/lib/widgets.py:358: DeprecationWarning: Use the new widget gtk.Tooltip
self.widgets['tooltips'].set_tip(self.widgets['preferences']['mail_smtp_server'], _("Use this entry to define the SMTP server you want to use to send e-mails. On *nix systems, 'localhost' should work. Alternatively, you can use your Internet Service Provider's SMTP server address."))
/usr/share/griffith/lib/widgets.py:359: DeprecationWarning: Use the new widget gtk.Tooltip
self.widgets['tooltips'].set_tip(self.widgets['preferences']['mail_email'], _("This is the from e-mail address that should be used to all outgoing e-mail. You want to include your own e-mail address here probably."))
/usr/share/griffith/lib/widgets.py:360: DeprecationWarning: Use the new widget gtk.Tooltip
self.widgets['tooltips'].set_tip(self.widgets['preferences']['mail_smtp_port'], _("Here you can define the smtp server port to use. If you want to use your gmail account service to send e-mails, try to enter '587' here. Default (and the most common one) is '25'"))
/usr/share/griffith/lib/widgets.py:361: DeprecationWarning: Use the new widget gtk.Tooltip
self.widgets['tooltips'].set_tip(self.widgets['preferences']['mail_use_tls'], _("If you need TLS support, please check this checkbox. This is needed, for example, when using gmail service to send your reminder e-mails."))
/usr/share/griffith/lib/main_treeview.py:145: DeprecationWarning: Use the new widget gtk.Tooltip
self.widgets['tooltips'].set_tip(w['region'], self._regions[0]) # N/A
Traceback (most recent call last):
File "/usr/share/griffith/lib/griffith", line 168, in on_export_activate
module = __import__('PluginExport%s' % plugin_name)
File "/usr/share/griffith/lib/plugins/export/PluginExportPDF.py", line 43, in <module>
from plugins.export import Base
File "/usr/share/griffith/lib/plugins/export/__init__.py", line 29, in <module>
import xml.dom.ext
ImportError: No module named ext