Another thing: _bsddb does not compile with db4.7:

Modules/_bsddb.c: In function `DBSequence_get_cachesize':
Modules/_bsddb.c:5022: warning: passing arg 2 of pointer to function
from incompatible pointer type
Modules/_bsddb.c: In function `DBEnv_db_home_get':
Modules/_bsddb.c:5331: error: structure has no member named `db_home'
Modules/_bsddb.c:5334: error: structure has no member named `db_home'
Modules/_bsddb.c: In function `PyInit__bsddb':
Modules/_bsddb.c:5948: error: `DB_LOG_AUTOREMOVE' undeclared (first use
in this function)
Modules/_bsddb.c:5948: error: (Each undeclared identifier is reported
only once
Modules/_bsddb.c:5948: error: for each function it appears in.)
Modules/_bsddb.c:5949: error: `DB_DIRECT_LOG' undeclared (first use in
this function)
Modules/_bsddb.c:5957: error: `DB_LOG_INMEMORY' undeclared (first use in
this function)

4.5 and 4.6 both give the first warning, but no errors.