diff -Nru cyrus-sasl2-2.1.25.dfsg1/debian/changelog cyrus-sasl2-2.1.25.dfsg1/debian/changelog
--- cyrus-sasl2-2.1.25.dfsg1/debian/changelog	2012-08-06 07:35:13.000000000 -0400
+++ cyrus-sasl2-2.1.25.dfsg1/debian/changelog	2012-10-14 04:41:42.000000000 -0400
@@ -1,3 +1,10 @@
+cyrus-sasl2 (2.1.25.dfsg1-5.1) unstable; urgency=low
+
+  * Non-maintainer upload.
+  * Apply upstream patch to bump ABI (closes: #665476).
+
+ -- Michael Gilbert <mgilbert@debian.org>  Sun, 14 Oct 2012 03:11:56 -0400
+
 cyrus-sasl2 (2.1.25.dfsg1-5) unstable; urgency=low
 
   * New sourceful upload (Closes: #676914)
diff -Nru cyrus-sasl2-2.1.25.dfsg1/debian/patches/0037-abi-bump.patch cyrus-sasl2-2.1.25.dfsg1/debian/patches/0037-abi-bump.patch
--- cyrus-sasl2-2.1.25.dfsg1/debian/patches/0037-abi-bump.patch	1969-12-31 19:00:00.000000000 -0500
+++ cyrus-sasl2-2.1.25.dfsg1/debian/patches/0037-abi-bump.patch	2012-10-14 04:41:57.000000000 -0400
@@ -0,0 +1,38 @@
+commit 69495a26cacc2b7fde398ce4b3a5904b34f52888
+Author: Alexey Melnikov <alexey.melnikov@isode.com>
+Date:   Sun Jun 3 22:18:50 2012 +0100
+
+    Updated libtool version for libsasl and its plugins due to ABI change
+    
+    Cyrus SASL Bug # 3692
+
+Index: cyrus-sasl2-2.1.25.dfsg1/lib/Makefile.am
+===================================================================
+--- cyrus-sasl2-2.1.25.dfsg1.orig/lib/Makefile.am	2012-10-14 03:09:30.000000000 -0400
++++ cyrus-sasl2-2.1.25.dfsg1/lib/Makefile.am	2012-10-14 03:13:54.486602573 -0400
+@@ -41,7 +41,9 @@
+ #
+ 
+ # Library version info - here at the top, for sanity
+-sasl_version = 2:25:0
++# See <http://www.gnu.org/software/libtool/manual/libtool.html#Versioning>
++# CURRENT:REVISION:AGE
++sasl_version = 3:0:0
+ 
+ INCLUDES=-I$(top_srcdir)/include -I$(top_srcdir)/plugins -I$(top_builddir)/include -I$(top_srcdir)/sasldb
+ 
+Index: cyrus-sasl2-2.1.25.dfsg1/plugins/Makefile.am
+===================================================================
+--- cyrus-sasl2-2.1.25.dfsg1.orig/plugins/Makefile.am	2011-09-05 10:18:10.000000000 -0400
++++ cyrus-sasl2-2.1.25.dfsg1/plugins/Makefile.am	2012-10-14 03:13:54.486602573 -0400
+@@ -45,8 +45,9 @@
+ ################################################################
+ 
+ # Library version info - here at the top, for sanity
++# See <http://www.gnu.org/software/libtool/manual/libtool.html#Versioning>
+ # CURRENT:REVISION:AGE
+-plugin_version = 2:25:0
++plugin_version = 3:0:0
+ 
+ INCLUDES=-I$(top_srcdir)/include -I$(top_srcdir)/lib -I$(top_srcdir)/sasldb -I$(top_builddir)/include
+ AM_LDFLAGS = -module -export-dynamic -rpath $(plugindir) -version-info $(plugin_version)
diff -Nru cyrus-sasl2-2.1.25.dfsg1/debian/patches/series cyrus-sasl2-2.1.25.dfsg1/debian/patches/series
--- cyrus-sasl2-2.1.25.dfsg1/debian/patches/series	2012-08-06 07:35:13.000000000 -0400
+++ cyrus-sasl2-2.1.25.dfsg1/debian/patches/series	2012-10-14 04:41:51.000000000 -0400
@@ -21,3 +21,4 @@
 0034-fix_dovecot_authentication.patch
 0035-temporary_multiarch_fixes.patch
 0036-add-reference-to-LDAP_SASLAUTHD-file.patch
+0037-abi-bump.patch
diff -Nru cyrus-sasl2-2.1.25.dfsg1/debian/rules cyrus-sasl2-2.1.25.dfsg1/debian/rules
--- cyrus-sasl2-2.1.25.dfsg1/debian/rules	2012-08-06 07:35:13.000000000 -0400
+++ cyrus-sasl2-2.1.25.dfsg1/debian/rules	2012-10-14 04:41:45.000000000 -0400
@@ -204,7 +204,7 @@
 	# Alter the rpath of certain binaries and shared libraries.
 	chrpath -d $(TMPPKG_MIT)/usr/sbin/sasldblistusers2 \
 		$(TMPPKG_MIT)/usr/sbin/saslpasswd2
-	chrpath -d $(TMPPKG_MIT)/usr/lib/$(DEB_HOST_MULTIARCH)/sasl2/libsql.so.2.0.*
+	chrpath -d $(TMPPKG_MIT)/usr/lib/$(DEB_HOST_MULTIARCH)/sasl2/libsql.so
 
 	# Install the sasl-sample-client and -server man pages.
 	dh_installman -psasl2-bin sasl-sample-client.8 sasl-sample-server.8