UnicodeDecodeError ao criar um Compromisso

[idgserpro]

Quando tento adicionar um Compromisso, com uma tag que possui um caracter especial, ocorre o erro:

2016-06-01 16:23:18 ERROR Zope.SiteErrorLog 1464808998.580.377376975952 http://localhost:8080/Plone/dddd/++add++Compromisso
Traceback (innermost last):
  Module ZPublisher.Publish, line 138, in publish
  Module ZPublisher.mapply, line 77, in mapply
  Module ZPublisher.Publish, line 48, in call_object
  Module plone.z3cform.layout, line 66, in __call__
  Module plone.z3cform.layout, line 50, in update
  Module plone.dexterity.browser.add, line 117, in update
  Module plone.z3cform.fieldsets.extensible, line 59, in update
  Module plone.z3cform.patch, line 30, in GroupForm_update
  Module z3c.form.group, line 145, in update
  Module plone.app.z3cform.csrf, line 21, in execute
  Module z3c.form.action, line 98, in execute
  Module z3c.form.button, line 315, in __call__
  Module z3c.form.button, line 170, in __call__
  Module plone.dexterity.browser.add, line 100, in handleAdd
  Module z3c.form.form, line 250, in createAndAdd
  Module plone.dexterity.browser.add, line 75, in add
  Module plone.dexterity.utils, line 185, in addContentToContainer
  Module Products.BTreeFolder2.BTreeFolder2, line 455, in _setObject
  Module zope.event, line 31, in notify
  Module zope.component.event, line 24, in dispatch
  Module zope.component._api, line 136, in subscribers
  Module zope.component.registry, line 321, in subscribers
  Module zope.interface.adapter, line 585, in subscribers
  Module zope.component.event, line 32, in objectEventNotify
  Module zope.component._api, line 136, in subscribers
  Module zope.component.registry, line 321, in subscribers
  Module zope.interface.adapter, line 585, in subscribers
  Module Products.CMFCore.CMFCatalogAware, line 262, in handleContentishEvent
  Module Products.CMFCore.CMFCatalogAware, line 188, in notifyWorkflowCreated
  Module Products.CMFCore.WorkflowTool, line 289, in notifyCreated
  Module Products.CMFCore.WorkflowTool, line 635, in _reindexWorkflowVariables
  Module Products.CMFCore.CMFCatalogAware, line 88, in reindexObject
  Module Products.CMFCore.CatalogTool, line 301, in reindexObject
  Module Products.CMFPlone.CatalogTool, line 353, in catalog_object
  Module Products.ZCatalog.ZCatalog, line 476, in catalog_object
  Module Products.ZCatalog.Catalog, line 353, in catalogObject
  Module Products.PluginIndexes.common.UnIndex, line 224, in index_object
  Module Products.PluginIndexes.KeywordIndex.KeywordIndex, line 66, in _index_object
  Module Products.PluginIndexes.common.UnIndex, line 199, in insertForwardIndexEntry
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 6: ordinal not in range(128)

[hvelarde]

esse problema continua acontecendo na 1.4.