product: browsing product by category raise unicode error

Create a new Product Category with unicode caracters.

Go to Products -> Product by Category
Double-clic on category with accent.

[Fri Jan 09 2009 09:47:29] ERROR:web-services:[01]: Traceback (most recent call last):
[Fri Jan 09 2009 09:47:29] ERROR:web-services:[02]: File "/home/dex/Work/dex4/server/bin/osv/osv.py", line 59, in wrapper
[Fri Jan 09 2009 09:47:29] ERROR:web-services:[03]: return f(self, dbname, *args, **kwargs)
[Fri Jan 09 2009 09:47:29] ERROR:web-services:[04]: File "/home/dex/Work/dex4/server/bin/osv/osv.py", line 119, in execute
[Fri Jan 09 2009 09:47:29] ERROR:web-services:[05]: res = pool.execute_cr(cr, uid, obj, method, *args, **kw)
[Fri Jan 09 2009 09:47:29] ERROR:web-services:[06]: File "/home/dex/Work/dex4/server/bin/osv/osv.py", line 111, in execute_cr
[Fri Jan 09 2009 09:47:29] ERROR:web-services:[07]: return getattr(object, method)(cr, uid, *args, **kw)
[Fri Jan 09 2009 09:47:29] ERROR:web-services:[08]: File "/home/dex/Work/dex4/server/bin/osv/orm.py", line 1073, in fields_view_get
[Fri Jan 09 2009 09:47:29] ERROR:web-services:[09]: xarch, xfields = self.__view_look_dom_arch(cr, user, doc, context=context)
[Fri Jan 09 2009 09:47:29] ERROR:web-services:[10]: File "/home/dex/Work/dex4/server/bin/osv/orm.py", line 857, in __view_look_dom_arch
[Fri Jan 09 2009 09:47:29] ERROR:web-services:[11]: fields_def = self.__view_look_dom(cr, user, node, context=context)
[Fri Jan 09 2009 09:47:29] ERROR:web-services:[12]: File "/home/dex/Work/dex4/server/bin/osv/orm.py", line 849, in __view_look_dom
[Fri Jan 09 2009 09:47:29] ERROR:web-services:[13]: fields.update(self.__view_look_dom(cr, user, f, context))
[Fri Jan 09 2009 09:47:29] ERROR:web-services:[14]: File "/home/dex/Work/dex4/server/bin/osv/orm.py", line 815, in __view_look_dom
[Fri Jan 09 2009 09:47:29] ERROR:web-services:[15]: node.setAttribute('string', result.decode('utf-8'))
[Fri Jan 09 2009 09:47:29] ERROR:web-services:[16]: File "/usr/lib/python2.5/encodings/utf_8.py", line 16, in decode
[Fri Jan 09 2009 09:47:29] ERROR:web-services:[17]: return codecs.utf_8_decode(input, errors, True)
[Fri Jan 09 2009 09:47:29] ERROR:web-services:[18]: UnicodeEncodeError: 'ascii' codec can't encode characters in position 23-24: ordinal not in range(128)

versions:
oo-server: 1581
oo-addons: 2083
oo-client: 874