+ * fixed bug 141a: the backquote printer now descends quoted
+ structure.
+ * fixed another bug in backquote printing: no more destructive
+ modification of the form's list structure. (reported by Brian
+ Downing)
+ * fixed bug in INTERRUPT-THREAD: pin the function, so that it cannot
+ move between its address being taken and the call to
+ interrupt_thread, fixing a crashing race condition.
+ * the SB-POSIX contrib implementation has been adjusted so that it
+ no longer exhibits ridiculously poor performance when constructing
+ instances corresponding to C structs.
+
+changes in sbcl-0.8.13 relative to sbcl-0.8.12:
+ * new feature: SB-PACKAGE-LOCKS. See the "Package Locks" section of
+ the manual for details; add :SB-PACKAGE-LOCKS in
+ customize-target-features.lisp to enable them.
+ * minor incompatible change: as threatened around sbcl-0.8.0, the
+ home package of MOP-related symbols is now SB-MOP, not SB-PCL.
+ The symbols are also exported from SB-PCL for backwards
+ compatibility, but more so than before SB-PCL should be treated as
+ an implementation-internal package.
+ * the SB-SPROF contrib now works on (most) non-x86 architectures.
+ It is known as of this release not to work on the Alpha, however.
+ * fixed bug #338: instances of EQL-SPECIFIER are now valid type
+ designators and can hence be used with TYPEP.
+ * fixed bug #333: CHECK-TYPE now ensures that the type error
+ signalled, if any, has the right object to be accessed by
+ TYPE-ERROR-DATUM. (reported by Tony Martinez)
+ * fixed bug #340: SETF of VALUES obeys the specification in ANSI
+ 5.1.2.3 for multiple-value place subforms. (reported by Kalle
+ Olavi Niemetalo)
+ * fixed bug #334: programmatic addition of slots using specialized
+ methods on SB-MOP:COMPUTE-SLOTS works for :ALLOCATION :INSTANCE
+ and :ALLOCATION :CLASS slots.
+ * fixed a bug: #\Space (and other whitespace characters) are no
+ longer considered to be macro characters in standard syntax by
+ GET-MACRO-CHARACTER.