diff --git a/documentation/changelog.html b/documentation/changelog.html
index 1f44d2a83d..d9b5c6d4e3 100755
--- a/documentation/changelog.html
+++ b/documentation/changelog.html
@@ -19,21 +19,29 @@
 <div id="outerframe">
 <div id="main">
 
-<h1>Dokeos 1.8.7.1 - </h1>
+<h1>Chamilo 1.8.7.1 - </h1>
+
 <h3>New Features</h3>
+<ul>
+  <li>The mPDF library (which is used for PDF-files generation) has been upgraded from version 4.2 to version 4.6 (Feature #1656)</li>
+</ul>
 
 <h3>Debugging</h3>
+<ul>
+  <li></li>
+</ul>
 
 <h3>Deprecated files</h3>
 <ul>
-  <li>html2pdf library (replaced by mpdf libray)</li>
+  <li>html2pdf library (replaced by mPDF libray)</li>
 </ul>
+
 <h1>Chamilo 1.8.7 - Istanbul</h1>
 <h3>Release notes - summary</h3>
 <p>Chamilo 1.8.7 is a major&nbsp;release including a lot of new features, mostly focused on social network, the handling of sessions (which will help many educational institutions, public or private, to manage their contents in a more flexible way) and visual style, and a few important bugfixes. It lays the first stable stone in the Chamilo software project. This version is the first one to <b>highly recommend PHP 5.2</b> or superior, and <b>require PHP 5.1</b> or higher.<br />Also, this version of Chamilo will automatically convert all your data to UTF-8, which will make it more difficult to migrate from Dokeos versions higher than 1.8.6.1</p>
 
 <h3>New Features</h3>
-<ul> 
+<ul>
   <li>Full UTF-8 support has been implemented (Feature #272)<ul>
     <li>UTF-8 becomes recommended system encoding to be used. It is also recommended that HTML-documents created with external tools be UTF-8 encoded.</li>
     <li>For newly installed systems: UTF-8 is the default value of the administrator's setting "Character set". Database tables will now be storing UTF-8 encoded text.</li>
@@ -95,10 +103,10 @@
   <li>Assignment tool: Fixed problem with work/assignment tool whereby a moved work lost the ability to be scored</li>
   <li>Announcement tool: display images inside content of announcement sent by email (now the attachment images are embedded inside content) - private BT#925</li>
   <li>User image is show in the course list (User portal)</li>
-  <li>Copy course sessions fixes see CT#1253</li>    
+  <li>Copy course sessions fixes see CT#1253</li>
   <li>SQL query fixed Wiki tool see CT#1201. Report by Hubert Borderiou</li>
   <li>Learning path: Show document title instead of filename. Report and fix sent by Hubert Borderiou; See CT#1038</li>
-  <li>Many other bug fixes</li>   
+  <li>Many other bug fixes</li>
 </ul>
 <h3>CSS changes</h3>
 <ul>
@@ -109,7 +117,7 @@
   <li>When installing the platform will be active by default the following options: Allow edit tutors in the courses of the sessions, social network and sending messages</li>
   <li>When you add an answer in Multiple choice or Multiple answers the score default is zero </li>
   <li>Portal news UI improvements</li>
-  <li>User portal page UI improvements</li>  
+  <li>User portal page UI improvements</li>
 </ul>
 <h3>Known issues</h3>
 <ul>
@@ -119,13 +127,13 @@
 </ul>
 <h3>Deprecated files</h3>
 <ul>
-  <li>Online editor: The plugins "Flash" (obsolete) and "placeholder" (non-relevant to the finished product) have been removed. (Feature #347)</li>  
+  <li>Online editor: The plugins "Flash" (obsolete) and "placeholder" (non-relevant to the finished product) have been removed. (Feature #347)</li>
 </ul>
 <h3>Security</h3>
 <ul>
   <li>HTMLPurifier updated to version 4.1.0</li>
   <li>FLV FCKEditor Plugin modified. SWFObject replaced with "object" and embed tags. Avoids the execution of javascript. See CT#1297</li>
-  <li>Security: fixed several possible SQL injections in links edition</li>  
+  <li>Security: fixed several possible SQL injections in links edition</li>
 </ul>
 <br />
 
diff --git a/documentation/credits.html b/documentation/credits.html
index a912f18e03..d26e92e8b0 100755
--- a/documentation/credits.html
+++ b/documentation/credits.html
@@ -19,7 +19,7 @@
 <a href="index.html">Documentation</a> &gt; Credits
 <h1>Creator (2000)</h1>
 
-Thomas De Praetere (thomas.depraetere@dokeos.com) 
+Thomas De Praetere (thomas.depraetere@dokeos.com)
 
 <h1>Core developers</h1>
 <ol>
@@ -69,7 +69,7 @@ Thomas De Praetere (thomas.depraetere@dokeos.com)
   <ul>
     <li> Juan Carlos Raña Trabado - considerable work on the wiki integration and improvements, and the FCKEditor/Mimetex extension as well as *many* FCKEditor's file manager and other modules improvements, as well as a continuous stream of recommendations that helped shape 1.8.5 and 1.8.6.*</li>
     <li> Ivan Tcholakov - various bugfixes in 1.8.6.*, very accurate bug reporting contributions and a considerable work in the integration of a new version of FCKEditor, along with a bunch of useful plugins and an exceptional work on internationalization</li>
-    
+
   </ul>
   </li>
 </ol>
@@ -286,6 +286,11 @@ rewritten by
   <li> Patrick Cool (patrick.cool@ugent.be</li>
 </ul>
 
+<h2>PDF-files generation</h2>
+<ul>
+  <li>Based on mPDF code library (http://mpdf.bpm1.com/). Main author: Ian N Back</li>
+  <li>Adaptation for Chamilo 1.8.x: Ivan Tcholakov</li>
+</ul>
 
 <h2>Platform administration</h2>
 <ul>
@@ -432,7 +437,7 @@ rewritten by
   <li>First integration: HTMLArea</li>
   <li>Second integration: FCKEditor</li>
   <li>Update to FCKEditor 2.6.2: Julio Montoya Armas(gugli100@gmail.com)</li>
-  <li>Update to FCKEditor 2.6.4 and addition of other plugins: Ivan Tcholakov</li>
+  <li>Update to FCKEditor 2.6.6 and addition of other plugins: Ivan Tcholakov</li>
 </ul>
 
 <h1>Translations</h1>
@@ -478,7 +483,7 @@ Please see http://www.chamilo.com/DLTT/ to see a list of the translators.
   <li> Paolo Mioni</li>
   <li> Diederik De Deckere</li>
   <li> Eric Remy</li>
-  <li> Roel Visseren</li>  
+  <li> Roel Visseren</li>
   <li> Michel Moreau-Belliard for his supervision on dynamic LDAP import tool</li>
   <li> Mustapha Alouani for his work on dynamic LDAP import tool</li>
   <li> Simon Zalar for a patch to FCKeditor 2.2 allowing linking in FF3</li>
@@ -493,12 +498,12 @@ of information requests and organizing great community events</li>
   <li> Ricardo Rodriguez, for implementing the first set of unit tests in 1.8.6, and manual testing and reporting</li>
   <li> Franco Cedillo, for minor bugfixes in 1.8.6</li>
   <li> Ruben Pereira, Ana Elena Olivera and all the kids from the Joaquin Sant'Anna school for being an inspiration to all of us.</li>
-  <li> Wolfgang Schneider for various bugfixes in various tools</li>   
+  <li> Wolfgang Schneider for various bugfixes in various tools</li>
   <li> Carlos Brolo  for reporting bugs for 1.8.7</li>
   <li> Hubert Borderiou - various bugfixes in 1.8.7 and very accurate bug reporting contributions </li>
   <li> David Auzeine- various bugfixes in 1.8.7</li>
   <li> Anna Frovola for reporting bugs for 1.8.7</li>
-  
+
 </ul>
 
 <h1>Removed developments</h1>