diff --git a/ChangeLog b/ChangeLog
index 197bea2..703e881 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,16 @@
+Changes in version 1.14.2
+
++ bugfix
+  * plugins/* - Davide Madrisan:
+  Execute 'notify.disable_colors()' when 'colorize' is set to '0' (disabled)
+  to ignore color redefinitions made by user.
+
++ improvement
+  * plugins/* - Davide Madrisan:
+  Do not load a library already loaded by another autospec module.
+
+-------------------------------------------------------------------------------
+
 Changes in version 1.14.1 - _TO*Hacklab release
 Fri Nov 09 2012 Davide Madrisan <davide.madrisan(a)gmail.com>
 
@@ -18,7 +31,7 @@ Fri Nov 09 2012 Davide Madrisan <davide.madrisan(a)gmail.com>
     Updated.
 
 + bugfix
-  * plugins/pck-update.in - Silvan Calarco:
+  * plugins/pck-update - Silvan Calarco:
     Restore build requirement detection for *.so requirements
 
 + improvement
diff --git a/lib/libapse.lib.in b/lib/libapse.lib.in
index f611294..1806b52 100644
--- a/lib/libapse.lib.in
+++ b/lib/libapse.lib.in
@@ -3,6 +3,9 @@
 # Copyright (C) 2007,2012 Stefano Cotta Ramusino <stefano.cotta@openmamba.org>
 # Copyright (C) 2008-2011 Silvan Calarco <silvan.calarco@mambasoft.it>
 
+[ "$libapse_is_loaded" = 1 ] || {
+libapse_is_loaded=1
+
 [ -z "$BASH" ] || [ ${BASH_VERSION:0:1} -lt 2 ] &&
    echo $"this script requires bash version 2 or better" >&2 && exit 1
 
@@ -590,3 +593,5 @@ a newer version of \`${NOTE}$specname${NORM}' is already installed"
 
    return $retval
 }
+
+} # endif $libapse_is_loaded
diff --git a/lib/libcfg.lib.in b/lib/libcfg.lib.in
index 79a03be..8f2bdaf 100644
--- a/lib/libcfg.lib.in
+++ b/lib/libcfg.lib.in
@@ -2,6 +2,9 @@
 # libcfg.lib -- @package@ library for loading the configuration file(s)
 # Copyright (C) 2008,2011,2012 Davide Madrisan <davide.madrisan@gmail.com>
 
+[ "$libcfg_is_loaded" = 1 ] || {
+libcfg_is_loaded=1
+
 [ -z "$BASH" ] || [ ${BASH_VERSION:0:1} -lt 2 ] &&
    echo $"this script requires bash version 2 or better" >&2 && exit 1
 
@@ -122,3 +125,5 @@ done
 [ "$cfg_files_num" = 0 ] && notify.error $"configuration file not found"
 
 unset cfg_file
+
+} # endif $libcfg_is_loaded
diff --git a/lib/libmsgmng.lib.in b/lib/libmsgmng.lib.in
index 47c7974..40a61bb 100644
--- a/lib/libmsgmng.lib.in
+++ b/lib/libmsgmng.lib.in
@@ -2,6 +2,9 @@
 # libmsgmng.lib -- @package@ library to manage debug/warning/error messages
 # Copyright (C) 2005,2006,2008,2012 Davide Madrisan <davide.madrisan@gmail.com>
 
+[ "$libmsgmng_is_loaded" = 1 ] || {
+libmsgmng_is_loaded=1
+
 [ -z "$BASH" ] || [ ${BASH_VERSION:0:1} -lt 2 ] &&
    echo $"this script requires bash version 2 or better" >&2 && exit 1
 
@@ -69,3 +72,5 @@ function notify.note() {
    [ ${verbose:-0} -ge 0 ] || return
    echo -e "${1:-$notify_def_msg}"
 }
+
+} # endif $libmsgmng_is_loaded
diff --git a/lib/libnetwork.lib.in b/lib/libnetwork.lib.in
index eddb093..c5983b1 100644
--- a/lib/libnetwork.lib.in
+++ b/lib/libnetwork.lib.in
@@ -2,6 +2,9 @@
 # libnetwork.lib -- @package@ library to get info from internet repositories
 # Copyright (C) 2008,2010,2012 Davide Madrisan <davide.madrisan@gmail.com>
 
+[ "$libnetwork_is_loaded" = 1 ] || {
+libnetwork_is_loaded=1
+
 [ -z "$BASH" ] || [ ${BASH_VERSION:0:1} -lt 3 ] &&
  { echo $"this script requires bash version 3 or better" >&2 && exit 1; }
 
@@ -1062,3 +1065,5 @@ an error occurred while creating"": ${pck_tarball}.tar.bz2"
 
    return 0
 }
+
+} # endif $libnetwork_is_loaded
diff --git a/lib/libspec.lib.in b/lib/libspec.lib.in
index 365bd42..8bd31a9 100644
--- a/lib/libspec.lib.in
+++ b/lib/libspec.lib.in
@@ -2,6 +2,9 @@
 # libspec.lib -- @package@ library to manage rpm specfiles
 # Copyright (C) 2004-2010,2012 Davide Madrisan <davide.madrisan@gmail.com>
 
+[ "$libspec_is_loaded" = 1 ] || {
+libspec_is_loaded=1
+
 [ -z "$BASH" ] || [ ${BASH_VERSION:0:1} -lt 2 ] &&
    echo $"this script requires bash version 2 or better" >&2 && exit 1
 
@@ -1244,3 +1247,5 @@ function getversionfromtarball() {
    notify.debug "$FUNCNAME: pck_version = \"$pck_version\""
    echo "$pck_version"
 }
+
+} # endif $libspec_is_loaded
diff --git a/lib/libtest.lib.in b/lib/libtest.lib.in
index befaeec..13e2cb0 100644
--- a/lib/libtest.lib.in
+++ b/lib/libtest.lib.in
@@ -2,6 +2,9 @@
 # libtest.lib -- @package@ library used by the test framework
 # Copyright (C) 2012 Davide Madrisan <davide.madrisan@gmail.com>
 
+[ "$libtest_is_loaded" = 1 ] || {
+libtest_is_loaded=1
+
 [ -z "$BASH" ] || [ ${BASH_VERSION:0:1} -lt 3 ] &&
  { echo $"this script requires bash version 3 or better" >&2 && exit 1; }
 
@@ -170,3 +173,5 @@ function test.runall() {
                --tmpdir "$tmpextractdir"
    done
 }
+
+} # endif $libtest_is_loaded