Question aboud #80 - itersize in cursor dic

Hi!
Thank for great library.
Dear group users, please help me with understanding of situation.

in psycopg2 extras.py

in 2.4.4 was:
 89     def __iter__(self):
 90         if self._prefetch:
 91             res = _cursor.fetchmany(self, self.itersize)
 92             if not res:
 93                 return
 94         if self._query_executed:
 95             self._build_index()
 96         if not self._prefetch:
 97             res = _cursor.fetchmany(self, self.itersize)
 98
 99         for r in res:
 100             yield r
 101
 102         # the above was the first itersize record. the following are
 103         # in a repeated loop.
 104         while 1:
 105             res = _cursor.fetchmany(self, self.itersize)
 106             if not res:
 107                 return
 108             for r in res:
 109                 yield r
 110

in 2.4.5 became:
   def __iter__(self):
       if self._prefetch:
           res = _cursor.__iter__(self)
           first = res.next()
       if self._query_executed:
           self._build_index()
       if not self._prefetch:
           res = _cursor.__iter__(self)
           first = res.next()

       yield first
       while 1:
           yield res.next()

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and now iterating over named cursor return 1 row, not many

Please help, should i use cursor.fetchmany instead?
Or how use itersize? (Why itersize not working)

Thank You

Alex