diff --git a/ice-9/ChangeLog b/ice-9/ChangeLog
index 6bbed5eae..95b39f8fb 100644
--- a/ice-9/ChangeLog
+++ b/ice-9/ChangeLog
@@ -1,3 +1,12 @@
+Tue Jan 11 10:49:22 2000  Greg J. Badros  <gjb@cs.washington.edu>
+
+	* boot-9.scm expect.scm, syncase.scm: Switch to new style
+ 	`simple-format' message strings: substitute ~A for %s, and ~S for
+ 	%S.
+
+	* boot-9.scm:  Added (define format simple-format) to expose that
+	primitive via the simpler name until format.scm is loaded.
+
 2000-01-09  Marius Vollmer  <mvo@zagadka.ping.de>
 
 	* boot-9.scm (try-using-libtool-name): Do not bother to look
diff --git a/libguile/ChangeLog b/libguile/ChangeLog
index bc8ddabb4..3469f6d33 100644
--- a/libguile/ChangeLog
+++ b/libguile/ChangeLog
@@ -1,3 +1,24 @@
+Tue Jan 11 10:41:46 2000  Greg J. Badros  <gjb@cs.washington.edu>
+
+	* dynl.c, error.c, eval.c, feature.c, filesys.c, fports.c, list.c, load.c,
+ 	net_db.c, read.c, socket.c: Update error messages to use ~A for
+ 	%s, ~S for %S to work with new `simple-format' format and be
+ 	standardized better.
+
+	* print.h, print.c (scm_simple_format): Added `simple-format'
+	primitive.  It's the old scm_display_error, with ARGS now a rest
+	parameter, and the destination first instead of last (and a couple 
+	new capabilities inspired by `format' -- #t as destination means
+	current-output-port, #f means return the formatted text as a
+	string.
+
+	* gh.h, gh_data.c, ports.h, ports.c: Added some missing const specifications.
+
+	* backtrace.c (scm_display_error_message): Rewrote to use
+	scm_simple_format() procedure.
+
+	* __scm.h: Added commented-out #define of GUILE_DEBUG_FREELIST
+
 2000-01-09  Marius Vollmer  <mvo@zagadka.ping.de>
 
  	Finally applied the libltdl patch from Thomas Tanner, with slight