Hy,

I created this post as a redline for me and other people who could have the same kind of issue.

My problem is when i try to export partners from the Web UI. I selected partners and then click on export. The usual form for listing the fields appears except that it is empty and the following error is thrown :

2013-10-15 21:56:04,307 19041 ERROR upa_dev openerp.addons.web.http.JSONRequest.dispatch: An error occured while handling a json request
Traceback (most recent call last):
  File "/home/florent/DEV/Serveurs/openerp-7.0-series/web/addons/web/http.py", line 204, in dispatch
    response["result"] = method(self, **self.params)
  File "/home/florent/DEV/Serveurs/openerp-7.0-series/web/addons/web/controllers/main.py", line 1479, in get_fields
    key=lambda field: field[1].get('string', ''))
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 7: ordinal not in range(128)

The point is that I add many fields inherited from partner. So one of them could have some problems. It looks like special characters are not accepted in the fields descriptions.