Update to 4.7.3:

4.7.3: (Python 2.6 release. First release with Python 3.0 support)
  * "private" is a keyword in C++.  (Duncan Grisby)
  * setup.py should install "bsddb.h".  (Duncan Grisby)
  * "DB_remove" memory corruption & crash.  (Duncan Grisby)
  * Under Python 3.0, you can't use string keys/values, but
    bytes ones. Print the right error message.
  * "DB.has_key()" allowed transactions as a positional parameter.
    We allow, now, transactions as a keyword parameter also, as
    documented.
  * Correct "DB.associate()" parameter order in the documentation.
  * "DB.append()" recognizes "txn" both as a positional and a
    keyword parameter.
  * Small fix in "dbshelve" for compatibility with Python 3.0.
  * A lot of changes in "dbtables" for compatibility with Python 3.0.
  * Huge work making the testsuite compatible with Python 3.0.
  * In some cases the C module returned Unicode strings under
    Python 3.0. It should return "bytes", ALWAYS. Solved.
  * Remove a dict.has_key() use to silence a warning raised under
    Python2.6 -3 parameter. Python SVN r65391, Brett Cannon.
  * Solve some memory leaks - Neal Norwitz
  * If DBEnv creation fails, library can crash.  (Victor Stinner)
  * Raising exceptions while doing a garbage collection
    will kill the interpreter.  (Victor Stinner)
  * Crash in "DB.verify()". Noted by solsTiCe d'Hiver.

(wiz)