diff --git a/CHANGES b/CHANGES
index 04ef9bc..34ee113 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,27 @@
+commit ed7a7d2c13c9479cea9a704cc2e7cf6b7b64833d
+Author: Dominik Hassler <hadfl@omniosce.org>
+Date:   Tue Sep 12 23:02:19 2017 +0200
+
+    diff option added
+
+commit fe0f8cc78e3e30fe374c954ed3a67737b26822e3
+Author: Dominik Hassler <hadfl@omniosce.org>
+Date:   Fri Sep 8 23:30:24 2017 +0200
+
+    add logo to README.md
+
+commit cbc6acb1589bf68ada9cd260eeb0ae526f6acd3f
+Author: Dominik Hassler <hadfl@omniosce.org>
+Date:   Fri Sep 8 01:14:23 2017 +0200
+
+    add minimal POD
+
+commit 88b0bd3d9cfad86a51d753f9bc08e44fbe33b0da
+Author: Dominik Hassler <hadfl@omniosce.org>
+Date:   Thu Aug 31 15:36:25 2017 +0200
+
+    ready for 0.1.10
+
 commit 5d5d7b3e1365ce2575bfb8a4392f25d8e14102d1
 Author: Dominik Hassler <hadfl@omniosce.org>
 Date:   Thu Aug 31 15:27:27 2017 +0200
diff --git a/README.md b/README.md
index 8beb8ac..6e5607c 100644
--- a/README.md
+++ b/README.md
@@ -5,9 +5,9 @@ pkgmgr
 
 [![Build Status](https://travis-ci.org/omniosorg/pkgmgr.svg?branch=master)](https://travis-ci.org/omniosorg/pkgmgr)
 
-Version: 0.1.10
+Version: 0.1.11
 
-Date: 2017-08-31
+Date: 2017-09-12
 
 pkgmgr is an IPS package management and publishing tool.
 
diff --git a/VERSION b/VERSION
index 9767cc9..20f4951 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.1.10
+0.1.11
diff --git a/configure b/configure
index 5e18285..9c1052d 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.69 for pkgmgr 0.1.10.
+# Generated by GNU Autoconf 2.69 for pkgmgr 0.1.11.
 #
 # Report bugs to <hadfl@omniosce.org>.
 #
@@ -580,8 +580,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='pkgmgr'
 PACKAGE_TARNAME='pkgmgr'
-PACKAGE_VERSION='0.1.10'
-PACKAGE_STRING='pkgmgr 0.1.10'
+PACKAGE_VERSION='0.1.11'
+PACKAGE_STRING='pkgmgr 0.1.11'
 PACKAGE_BUGREPORT='hadfl@omniosce.org'
 PACKAGE_URL=''
 
@@ -1220,7 +1220,7 @@ 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 pkgmgr 0.1.10 to adapt to many kinds of systems.
+\`configure' configures pkgmgr 0.1.11 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1286,7 +1286,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of pkgmgr 0.1.10:";;
+     short | recursive ) echo "Configuration of pkgmgr 0.1.11:";;
    esac
   cat <<\_ACEOF
 
@@ -1372,7 +1372,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-pkgmgr configure 0.1.10
+pkgmgr configure 0.1.11
 generated by GNU Autoconf 2.69
 
 Copyright (C) 2012 Free Software Foundation, Inc.
@@ -1389,7 +1389,7 @@ 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 pkgmgr $as_me 0.1.10, which was
+It was created by pkgmgr $as_me 0.1.11, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   $ $0 $@
@@ -2259,7 +2259,7 @@ fi
 
 # Define the identity of the package.
  PACKAGE='pkgmgr'
- VERSION='0.1.10'
+ VERSION='0.1.11'
 
 
 cat >>confdefs.h <<_ACEOF
@@ -3425,7 +3425,7 @@ 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 pkgmgr $as_me 0.1.10, which was
+This file was extended by pkgmgr $as_me 0.1.11, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -3478,7 +3478,7 @@ _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-pkgmgr config.status 0.1.10
+pkgmgr config.status 0.1.11
 configured by $0, generated by GNU Autoconf 2.69,
   with options \\"\$ac_cs_config\\"
 
diff --git a/doc/pkgmgr.pod b/doc/pkgmgr.pod
index 8a28bf6..b8feeba 100644
--- a/doc/pkgmgr.pod
+++ b/doc/pkgmgr.pod
@@ -10,6 +10,8 @@ where 'command' is one of the following:
 
     list <repo> [-t <interval>|<ISO time>] [--src|dst|staging] [pkg_fmri_pattern ...]
     
+    diff <ref_repo> <diff_repo> [--src|dst|staging] [pkg_fmri_pattern ...]
+
     stage <repo> [-y] [-n] [pkg_fmri_pattern ...]
     
     publish <repo> [-y] [-n] [pkg_fmri_pattern ...]
@@ -41,6 +43,12 @@ If the B<-t> option is used, only packages that have a more recent ISO timestamp
 be listed or a timestamp within B<interval> timespan. B<interval> can be suffixed
 with s, M, h, d, m, y (defaults to seconds).
 
+=head2 B<diff>
+
+returns a diff of package versions in the repositories that match the B<pkg_fmri_pattern>,
+publisher and release. Use the B<--src|dst|staging> option to specify which
+repositories to diff. Defaults to B<--src> if not defined.
+
 =head2 B<stage>
 
 stages the packages that match the B<pkg_fmri_pattern>, publisher and release.
@@ -80,6 +88,10 @@ list all packages in the staging repository of 'r151022' containing the string '
 
     pkgmgr list r151022 --staging '*gnu*'
 
+show all packages that have changed between r151022 and bloody in the destination repos
+
+    pkgmgr diff r151022 bloody --dst
+
 stage all packages that have changed within the last 2 hours for repository 'r151022'
 
     pkgmgr list r151022 -t 2h | pkgmgr stage r151022
diff --git a/man/pkgmgr.1 b/man/pkgmgr.1
index 8dec752..6e3e9db 100644
--- a/man/pkgmgr.1
+++ b/man/pkgmgr.1
@@ -133,7 +133,7 @@
 .\" ========================================================================
 .\"
 .IX Title "PKGMGR 1"
-.TH PKGMGR 1 "2017-08-31" "0.1.10" "pkgmgr"
+.TH PKGMGR 1 "2017-09-12" "0.1.11" "pkgmgr"
 .\" For nroff, turn off justification.  Always turn off hyphenation; it makes
 .\" way too many mistakes in technical documents.
 .if n .ad l
@@ -149,6 +149,8 @@ where 'command' is one of the following:
 .Vb 1
 \&    list <repo> [\-t <interval>|<ISO time>] [\-\-src|dst|staging] [pkg_fmri_pattern ...]
 \&    
+\&    diff <ref_repo> <diff_repo> [\-\-src|dst|staging] [pkg_fmri_pattern ...]
+\&
 \&    stage <repo> [\-y] [\-n] [pkg_fmri_pattern ...]
 \&    
 \&    publish <repo> [\-y] [\-n] [pkg_fmri_pattern ...]
@@ -178,6 +180,11 @@ repository to list. Defaults to \fB\-\-src\fR if not defined.
 If the \fB\-t\fR option is used, only packages that have a more recent \s-1ISO\s0 timestamp will
 be listed or a timestamp within \fBinterval\fR timespan. \fBinterval\fR can be suffixed
 with s, M, h, d, m, y (defaults to seconds).
+.SS "\fBdiff\fP"
+.IX Subsection "diff"
+returns a diff of package versions in the repositories that match the \fBpkg_fmri_pattern\fR,
+publisher and release. Use the \fB\-\-src|dst|staging\fR option to specify which
+repositories to diff. Defaults to \fB\-\-src\fR if not defined.
 .SS "\fBstage\fP"
 .IX Subsection "stage"
 stages the packages that match the \fBpkg_fmri_pattern\fR, publisher and release.
@@ -213,6 +220,12 @@ list all packages in the staging repository of 'r151022' containing the string '
 \&    pkgmgr list r151022 \-\-staging \*(Aq*gnu*\*(Aq
 .Ve
 .PP
+show all packages that have changed between r151022 and bloody in the destination repos
+.PP
+.Vb 1
+\&    pkgmgr diff r151022 bloody \-\-dst
+.Ve
+.PP
 stage all packages that have changed within the last 2 hours for repository 'r151022'
 .PP
 .Vb 1