diff -r b176ac0e3aaa -r 656c974961c4 server/sources/rql2sql.py
--- a/server/sources/rql2sql.py	Mon Jun 21 17:10:25 2010 +0200
+++ b/server/sources/rql2sql.py	Mon Jun 21 17:30:15 2010 +0200
@@ -1146,8 +1146,6 @@
                 _id = _id.encode()
         else:
             _id = str(id(constant)).replace('-', '', 1)
-            if isinstance(value, unicode):
-                value = value.encode(self.dbencoding)
             self._query_attrs[_id] = value
         return '%%(%s)s' % _id