diff --git a/buildInstallers.xml b/buildInstallers.xml
index 474004165f456cab114e92474b89cf5c91237802..d5e90264545b878e22ceb58633e0d55926c03f1d 100644
--- a/buildInstallers.xml
+++ b/buildInstallers.xml
@@ -43,21 +43,28 @@ ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 POSSIBILITY OF SUCH DAMAGE.
   -->
   
-  <property name="installers.dir" location="installers"/>
+    <property name="installers.dir" location="installers"/>
+
+    <!-- Prerequisite for creating installer: you must have local izPack v5+ installed -->
+    <property file="nbproject/private/access.properties"/>
+    <property name="izpack-dist"    value="${IZPACK_DIST}" description="local installation of latest distribution from http://izpack.org"/>
+    <path id="lib.path">
+      <fileset dir="${izpack-dist}/lib" includes="*.jar"/>
+    </path>
+    
+    <target name="update.izpack.jar">
+        <echo message="Prerequisite: apply .jar fix in installers/util/izpack-lang-fix in local $IZPACK_DIST .jar at"/>
+        <echo message="   ${IZPACK_DIST}/lib/izpack-core-5.1.3.jar"/>
+        <copy file="installers/util/izpack-core-5.1.3.jar" todir="${IZPACK_DIST}/lib/" verbose="true" force="true"/>
+    </target>
   
-  <!-- Prerequisite for creating installer: you must have local izPack v5+ installed -->
-  <property file="nbproject/private/access.properties"/>
-  <property name="izpack-dist"    value="${IZPACK_DIST}" description="local installation of latest distribution from http://izpack.org"/>
-  <path id="lib.path">
-    <fileset dir="${izpack-dist}/lib" includes="*.jar"/>
-  </path>
-  <taskdef name="izpack"
+    <taskdef name="izpack"
            classpathref="lib.path"
            classname="com.izforge.izpack.ant.IzPackTask"/>
   
-  <target name="build.installers"
+    <target name="build.installers"
           description="Build Xj3D installer jars"
-          depends="clean.installer.materials">
+          depends="clean.installers">
       
     <!-- TODO validate the izPack XML files -->
 
@@ -108,13 +115,17 @@ POSSIBILITY OF SUCH DAMAGE.
 
     <chmod file="${installers.dir}/${win.linux.32.64.installer.jar}" perm="ugo+rx"/>
     <chmod file="${installers.dir}/${macosx.installer.jar}"          perm="ugo+rx"/>
-
+    
+    <length file="${installers.dir}/${win.linux.32.64.installer.jar}" property="length.win.linux.32.64.installer.jar"/>
+    <length file="${installers.dir}/${macosx.installer.jar}"          property="length.macosx.installer.jar"/>
+    <echo message="Installer file sizes: ${win.linux.32.64.installer.jar}=${length.win.linux.32.64.installer.jar} bytes, ${macosx.installer.jar}=${length.macosx.installer.jar} bytes"/>
+    <echo/>
     <echo message="IzPack installer builds complete"/>
 
   </target>
 
-  <target name="clean.installer.materials"
-          description="Clean up all materials generated from producing the installers">
+  <target name="clean.installers"
+          description="Clean up all executables generated by producing the installers">
 
       <delete>
           <fileset dir="installers">