[#1412 changing zwiki.org issue properties can give a unicode error]

I worked with issues for hours yesterday without trouble, but trying to close #1373 gives an error::

 2008-05-02T10:01:46 ERROR Zope.SiteErrorLog http://zwiki.org/1373AttributeErrorPtMacrosInPlone/changeIssueProperties
 Traceback (innermost last):
  Module ZPublisher.Publish, line 119, in publish
  Module ZPublisher.mapply, line 88, in mapply
  Module ZPublisher.Publish, line 42, in call_object
  Module Products.ZWiki.plugins.tracker.tracker, line 365, in changeIssueProperties
  Module Products.ZWiki, line 236, in manage_changeProperties
  Module Products.ZWiki.Catalog, line 123, in reindex_object
  Module Products.ZWiki.Catalog, line 119, in unindex_object
  Module Products.ZCatalog.ZCatalog, line 568, in uncatalog_object
  Module Products.ZCatalog.Catalog, line 389, in uncatalogObject
  Module Products.PluginIndexes.common.UnIndex, line 299, in unindex_object
  Module Products.PluginIndexes.common.UnIndex, line 165, in removeForwardIndexEntry
 UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 1: ordinal not in range(128)

extra logging::

 2008-05-02T10:01:46 ERROR Zope.UnIndex Unicode error removing u'Jordan Carswell' entry from <FieldIndex at /zwiki.org/Catalog/last_editor>

Questions: why this page and not others ? Do we need unicode-aware versions of field, keyword, date, path indexes as well ?
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forwarded from http://zwiki.org/1412ChangingZwikiOrgIssuePropertiesCanGiveAUnicodeError#[email protected]