We're seeing problems in one application here due to the catalog and interactions with Unicode. Here's what happens: - an object is indexed with a Unicode title, so in the catalog the metadata tuple has for instance (u'cafe',) - later that title is changed to latin-1, so the new metadata tuple would be ('caf\xe9',) The problem is that Catalog.py has in updateMetadata() the code: if data.get(index, 0) != newDataRecord: data[index] = newDataRecord The simple comparison in the first line provokes a UnicodeDecodeError, you can reproduce by a simple: python -c "u'e' == '\xe9'" This understandable, but in the case of the catalog really not helpful. I propose to change the code above to: try: changed = data.get(index, 0) != newDataRecord except UnicodeDecodeError: changed = True if changed: data[index] = newDataRecord Objections ? Florent -- Florent Guillaume, Nuxeo (Paris, France) CTO, Director of R&D +33 1 40 33 71 59 http://nuxeo.com fg@nuxeo.com