diff --git a/configure b/configure
index 2f24617f0..ae4605ca1 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.64 for Gambit-C v4.6.0.
+# Generated by GNU Autoconf 2.64 for Gambit-C v4.6.1.
 #
 # Report bugs to <gambit@iro.umontreal.ca>.
 #
@@ -550,9 +550,9 @@ MAKEFLAGS=
 
 # Identity of this package.
 PACKAGE_NAME='Gambit-C'
-PACKAGE_TARNAME='gambc-v4_6_0'
-PACKAGE_VERSION='v4.6.0'
-PACKAGE_STRING='Gambit-C v4.6.0'
+PACKAGE_TARNAME='gambc-v4_6_1'
+PACKAGE_VERSION='v4.6.1'
+PACKAGE_STRING='Gambit-C v4.6.1'
 PACKAGE_BUGREPORT='gambit@iro.umontreal.ca'
 PACKAGE_URL=''
 
@@ -1425,7 +1425,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures Gambit-C v4.6.0 to adapt to many kinds of systems.
+\`configure' configures Gambit-C v4.6.1 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1473,7 +1473,7 @@ Fine tuning of the installation directories:
   --infodir=DIR           info documentation [DATAROOTDIR/info]
   --localedir=DIR         locale-dependent data [DATAROOTDIR/locale]
   --mandir=DIR            man documentation [DATAROOTDIR/man]
-  --docdir=DIR            documentation root [DATAROOTDIR/doc/gambc-v4_6_0]
+  --docdir=DIR            documentation root [DATAROOTDIR/doc/gambc-v4_6_1]
   --htmldir=DIR           html documentation [DOCDIR]
   --dvidir=DIR            dvi documentation [DOCDIR]
   --pdfdir=DIR            pdf documentation [DOCDIR]
@@ -1495,7 +1495,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of Gambit-C v4.6.0:";;
+     short | recursive ) echo "Configuration of Gambit-C v4.6.1:";;
    esac
   cat <<\_ACEOF
 
@@ -1623,7 +1623,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-Gambit-C configure v4.6.0
+Gambit-C configure v4.6.1
 generated by GNU Autoconf 2.64
 
 Copyright (C) 2009 Free Software Foundation, Inc.
@@ -2303,7 +2303,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by Gambit-C $as_me v4.6.0, which was
+It was created by Gambit-C $as_me v4.6.1, which was
 generated by GNU Autoconf 2.64.  Invocation command line was
 
   $ $0 $@
@@ -12311,7 +12311,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by Gambit-C $as_me v4.6.0, which was
+This file was extended by Gambit-C $as_me v4.6.1, which was
 generated by GNU Autoconf 2.64.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -12371,7 +12371,7 @@ Report bugs to <gambit@iro.umontreal.ca>."
 _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_version="\\
-Gambit-C config.status v4.6.0
+Gambit-C config.status v4.6.1
 configured by $0, generated by GNU Autoconf 2.64,
   with options \\"`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`\\"
 
diff --git a/configure.ac b/configure.ac
index 5ec305e7b..c34fa8b52 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4,7 +4,7 @@
 
 # Process this file with autoconf to produce a configure script.
 
-AC_INIT(Gambit-C,v4.6.0,gambit@iro.umontreal.ca,gambc-v4_6_0)
+AC_INIT(Gambit-C,v4.6.1,gambit@iro.umontreal.ca,gambc-v4_6_1)
 
 AC_CONFIG_HEADERS(include/config.h)
 
diff --git a/examples/iOS/Prefix.pch b/examples/iOS/Prefix.pch
deleted file mode 100644
index bcd69b806..000000000
--- a/examples/iOS/Prefix.pch
+++ /dev/null
@@ -1,8 +0,0 @@
-//
-// Prefix header
-//
-
-#ifdef __OBJC__
-    #import <Foundation/Foundation.h>
-    #import <UIKit/UIKit.h>
-#endif
diff --git a/examples/iOS/ViewController.m b/examples/iOS/ViewController.m
index 9b0f5c637..5936ec866 100644
--- a/examples/iOS/ViewController.m
+++ b/examples/iOS/ViewController.m
@@ -26,7 +26,7 @@ @implementation ViewController
  * ___VERSION must match the version number of the Gambit header file.
  */
 
-#define ___VERSION 406000
+#define ___VERSION 406001
 #include "gambit.h"
 
 /*
diff --git a/examples/pthread/pthread.c b/examples/pthread/pthread.c
index 9b7a7a448..2b25736ce 100644
--- a/examples/pthread/pthread.c
+++ b/examples/pthread/pthread.c
@@ -9,7 +9,7 @@
  * ___VERSION must match the version number of the Gambit header file.
  */
 
-#define ___VERSION 406000
+#define ___VERSION 406001
 #include "gambit.h"
 
 /*
diff --git a/include/gambit.h.in b/include/gambit.h.in
index f1ca1af9a..24708b0e5 100644
--- a/include/gambit.h.in
+++ b/include/gambit.h.in
@@ -8,8 +8,8 @@
 #error "___VERSION has not been set by includer"
 #endif
 
-#if ___VERSION != 406000
-#include "gambit-not406000.h"
+#if ___VERSION != 406001
+#include "gambit-not406001.h"
 #else
 
 #ifndef ___GAMBIT_H
diff --git a/lib/c_intf.c b/lib/c_intf.c
index 58bf7f7b0..8758fe832 100644
--- a/lib/c_intf.c
+++ b/lib/c_intf.c
@@ -8,7 +8,7 @@
  */
 
 #define ___INCLUDED_FROM_C_INTF
-#define ___VERSION 406000
+#define ___VERSION 406001
 #include "gambit.h"
 
 #include "os_base.h"
diff --git a/lib/main.c b/lib/main.c
index 75188f003..ce1f20227 100644
--- a/lib/main.c
+++ b/lib/main.c
@@ -5,7 +5,7 @@
 /* This is the driver of the Gambit-C system */
 
 #define ___INCLUDED_FROM_MAIN
-#define ___VERSION 406000
+#define ___VERSION 406001
 #include "gambit.h"
 
 #include "os_base.h"
diff --git a/lib/mem.c b/lib/mem.c
index 10a38ca02..8bdf28af2 100755
--- a/lib/mem.c
+++ b/lib/mem.c
@@ -3,7 +3,7 @@
 /* Copyright (c) 1994-2009 by Marc Feeley, All Rights Reserved.  */
 
 #define ___INCLUDED_FROM_MEM
-#define ___VERSION 406000
+#define ___VERSION 406001
 #include "gambit.h"
 
 #include "os_base.h"
diff --git a/lib/os.c b/lib/os.c
index 79e38901e..ce174c2cd 100644
--- a/lib/os.c
+++ b/lib/os.c
@@ -28,7 +28,7 @@
  */
 
 #define ___INCLUDED_FROM_OS
-#define ___VERSION 406000
+#define ___VERSION 406001
 #include "gambit.h"
 
 #include "os_base.h"
diff --git a/lib/os_base.c b/lib/os_base.c
index 557ecdc0b..8d15be44b 100644
--- a/lib/os_base.c
+++ b/lib/os_base.c
@@ -7,7 +7,7 @@
  */
 
 #define ___INCLUDED_FROM_OS_BASE
-#define ___VERSION 406000
+#define ___VERSION 406001
 #include "gambit.h"
 
 #include "os_base.h"
diff --git a/lib/os_dyn.c b/lib/os_dyn.c
index eb99c7cf3..7e5cc0dae 100644
--- a/lib/os_dyn.c
+++ b/lib/os_dyn.c
@@ -8,7 +8,7 @@
  */
 
 #define ___INCLUDED_FROM_OS_DYN
-#define ___VERSION 406000
+#define ___VERSION 406001
 #include "gambit.h"
 
 #include "os_base.h"
diff --git a/lib/os_files.c b/lib/os_files.c
index 83e36b019..5842a7a4a 100644
--- a/lib/os_files.c
+++ b/lib/os_files.c
@@ -8,7 +8,7 @@
  */
 
 #define ___INCLUDED_FROM_OS_FILES
-#define ___VERSION 406000
+#define ___VERSION 406001
 #include "gambit.h"
 
 #include "os_base.h"
diff --git a/lib/os_io.c b/lib/os_io.c
index 2b411e094..e49186088 100644
--- a/lib/os_io.c
+++ b/lib/os_io.c
@@ -8,7 +8,7 @@
  */
 
 #define ___INCLUDED_FROM_OS_IO
-#define ___VERSION 406000
+#define ___VERSION 406001
 #include "gambit.h"
 
 #include "os_base.h"
diff --git a/lib/os_shell.c b/lib/os_shell.c
index 987f3a88c..395806b34 100644
--- a/lib/os_shell.c
+++ b/lib/os_shell.c
@@ -8,7 +8,7 @@
  */
 
 #define ___INCLUDED_FROM_OS_SHELL
-#define ___VERSION 406000
+#define ___VERSION 406001
 #include "gambit.h"
 
 #include "os_base.h"
diff --git a/lib/os_time.c b/lib/os_time.c
index 46ff8c3ce..9fdf67f3e 100644
--- a/lib/os_time.c
+++ b/lib/os_time.c
@@ -8,7 +8,7 @@
  */
 
 #define ___INCLUDED_FROM_OS_TIME
-#define ___VERSION 406000
+#define ___VERSION 406001
 #include "gambit.h"
 
 #include "os_base.h"
diff --git a/lib/os_tty.c b/lib/os_tty.c
index 4bbc49e31..a2f9a4db2 100644
--- a/lib/os_tty.c
+++ b/lib/os_tty.c
@@ -8,7 +8,7 @@
  */
 
 #define ___INCLUDED_FROM_OS_TTY
-#define ___VERSION 406000
+#define ___VERSION 406001
 #include "gambit.h"
 
 #include "os_base.h"
diff --git a/lib/setup.c b/lib/setup.c
index 9b86101f1..1022a9631 100644
--- a/lib/setup.c
+++ b/lib/setup.c
@@ -8,7 +8,7 @@
  */
 
 #define ___INCLUDED_FROM_SETUP
-#define ___VERSION 406000
+#define ___VERSION 406001
 #include "gambit.h"
 
 #include "os_base.h"
diff --git a/tests/client.c b/tests/client.c
index 2b5dc7eb9..23726f5e3 100644
--- a/tests/client.c
+++ b/tests/client.c
@@ -9,7 +9,7 @@
  * ___VERSION must match the version number of the Gambit header file.
  */
 
-#define ___VERSION 406000
+#define ___VERSION 406001
 #include "gambit.h"
 
 /*
diff --git a/tests/test5.ok b/tests/test5.ok
index 5e99520d4..f511677cc 100644
--- a/tests/test5.ok
+++ b/tests/test5.ok
@@ -1,7 +1,7 @@
 #ifdef ___LINKER_INFO
-; File: "mix.c", produced by Gambit-C v4.6.0
+; File: "mix.c", produced by Gambit-C v4.6.1
 (
-406000
+406001
 " mix"
 (" mix")
 (
@@ -397,7 +397,7 @@
  #f
 )
 #else
-#define ___VERSION 406000
+#define ___VERSION 406001
 #define ___MODULE_NAME " mix"
 #define ___LINKER_ID ____20_mix
 #define ___MH_PROC ___H__20_mix