UnicodeDecodeError

Hi!

  I've an Zope application, basically postgres + zpt.

  The postgres db has been upgraded to 8.5, the data inside is utf-8 
(dumped and checkd it), the pg adapeter is the latest, and the "*Z 
Psycopg 2 Database Connection" is configured to use utf-8.* Zope is  
2.12.20 + latest security fix.

  When I try to do:

<span tal:replace="result/?column" /> (result came from an ZSQL method) 
I get an UnicodeDecodeError:

Traceback (innermost last):
   Module ZPublisher.Publish, line 127, in publish
   Module ZPublisher.mapply, line 77, in mapply
   Module ZPublisher.Publish, line 47, in call_object
   Module Shared.DC.Scripts.Bindings, line 324, in __call__
   Module Shared.DC.Scripts.Bindings, line 361, in _bindAndExec
   Module Products.PageTemplates.ZopePageTemplate, line 335, in _exec
   Module Products.PageTemplates.ZopePageTemplate, line 432, in pt_render
   Module Products.PageTemplates.PageTemplate, line 80, in pt_render
   Module zope.pagetemplate.pagetemplate, line 113, in pt_render
   Module zope.tal.talinterpreter, line 271, in __call__
   Module zope.tal.talinterpreter, line 343, in interpret
   Module zope.tal.talinterpreter, line 888, in do_useMacro
   Module zope.tal.talinterpreter, line 343, in interpret
   Module zope.tal.talinterpreter, line 946, in do_defineSlot
   Module zope.tal.talinterpreter, line 343, in interpret
   Module zope.tal.talinterpreter, line 533, in do_optTag_tal
   Module zope.tal.talinterpreter, line 518, in do_optTag
   Module zope.tal.talinterpreter, line 513, in no_tag
   Module zope.tal.talinterpreter, line 343, in interpret
   Module zope.tal.talinterpreter, line 821, in do_loop_tal
   Module zope.tal.talinterpreter, line 343, in interpret
   Module zope.tal.talinterpreter, line 821, in do_loop_tal
   Module zope.tal.talinterpreter, line 343, in interpret
   Module zope.tal.talinterpreter, line 852, in do_condition
   Module zope.tal.talinterpreter, line 343, in interpret
   Module zope.tal.talinterpreter, line 376, in do_startEndTag
   Module zope.tal.talinterpreter, line 405, in do_startTag
   Module zope.tal.talinterpreter, line 502, in attrAction_tal
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 38: 
ordinal not in range(128)

if I do:

<span tal:replace="python:str(result['column']).decode('utf-8')" /> it 
works. (I use str because I've also dates in the record, otherwise I 
could not decode being it not a string)

I've several zpt to fix, and I would like it to work as it should. My 
analisys is that result['column'] is seen as a plain string with \xx 
characters inside, and decode just transform it in something that Zope 
recognize as utf-8 when it prints it.

Anyway, any idea?
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