SBCL 1.3.9

changes in sbcl-1.3.9 relative to sbcl-1.3.8:
  * minor incompatible change: NAMESTRING prefers to return a BASE-STRING
    instead of (ARRAY CHARACTER (*)) when possible.
  * enhancement: cached make-instance/allocate-instance constructors can now
    get garbage collected.
  * optimization: better performance for some unoptimized operations on
    complex numbers.
  * bug fix: using the options :LOCAL-NICKNAMES and :LOCK in the same
    DEFPACKAGE form no longer signals a bogus error