+;;; 49: (2004-05-04) Changed implementation of DEFFOO macros and the
+;;; functions they expand to.
+;;; 50: (2004-05-20) Changed %COMPILER-DEFUN signature again.
+;;; 51: (2004-07-24) Package locks (SBCL 0.8.12.7) changed signature of
+;;; %DEFPACKAGE.
+;;; 52: (2004-11-02) Merge of SB-UNICODE.
+;;; 53: (2005-02-22) Something introduced in SBCL 0.8.19.26 (give or take
+;;; a couple of patches) invalidated some FFI-related fasls. Probably
+;;; caused by "lazy alien resolution improvements".
+;;; 54: (2005-03-22) At least "0.8.20.6: Make FILE-STREAM and STRING-STREAM
+;;; potential mixins in CLOS" and "0.8.20.21: Add immediate single-floats
+;;; on x86-64."
+;;; 55: (2005-04-06) EXTERN-ALIEN-NAME logic moved from fixups to
+;;; FIND-FOREIGN-SYMBOL-IN-TABLE &co.
+;;; 56: (2005-05-22) Something between 0.9.0.1 and 0.9.0.14. My money is
+;;; on 0.9.0.6 (MORE CASE CONSISTENCY).
+;;; 57: (2005-06-12) Raw slot rearrangement in 0.9.1.38