Changes 2.4.5:
* The close() methods on connections and cursors don't raise exceptions if
  called on already closed objects.
* Fixed fetchmany() with no argument in cursor subclasses.
* Use lo_creat() instead of lo_create() when possible for better interaction
  with pgpool-II.
* Error and its subclasses are picklable, useful for multiprocessing interaction
* Better efficiency and formatting of timezone offset objects thanks to Menno
  Smits.
* Fixed rownumber during iteration on cursor subclasses. Regression introduced
  in 2.4.4.
* Added support for inet arrays.
* Fixed commit() concurrency problem.
* Codebase cleaned up using the GCC Python plugin's static analysis tool, which
  has revealed several unchecked return values, possible NULL dereferences,
  reference counting problems.

(adam)