latin character u'\u0103' server error

[Mihai Satmarean]

Binary package hint: openerp-server

I am using a custom module, based on product_extended,
somehow the server throws this when I want to print a report:
(I do have some custom lablels)

Server Ubuntu 10.04
openerp ver 6RC2

Client
Firefox 3.6 under windows xp

Unrecoverable error in the server.
Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.6/cherrypy/_cprequest.py", line 541, in run
    self.respond(pi)
  File "/usr/lib/pymodules/python2.6/cherrypy/_cprequest.py", line 624, in respond
    self.handle_error()
  File "/usr/lib/pymodules/python2.6/cherrypy/_cprequest.py", line 748, in handle_error
    cherrypy.response.finalize()
  File "/usr/lib/pymodules/python2.6/cherrypy/_cprequest.py", line 880, in finalize
    self.header_list = h = headers.output(cherrypy.request.protocol)
  File "/usr/lib/pymodules/python2.6/cherrypy/lib/http.py", line 368, in output
    v = v.encode("iso-8859-1")
UnicodeEncodeError: 'latin-1' codec can't encode character u'\u0103' in position 14: ordinal not in range(256)