diff --git a/core/doc/techdoc/chapter-aerodynamic-properties.tex b/core/doc/techdoc/chapter-aerodynamic-properties.tex
index a4ca80356..afb167e84 100644
--- a/core/doc/techdoc/chapter-aerodynamic-properties.tex
+++ b/core/doc/techdoc/chapter-aerodynamic-properties.tex
@@ -2234,6 +2234,7 @@ for the purposes of this thesis.
 
 
 \section{Tumbling bodies}
+\label{sec-tumbling-bodies}
 
 % Renaming of test vs. models here:
 %
diff --git a/core/doc/techdoc/techdoc.pdf b/core/doc/techdoc/techdoc.pdf
index 6a12a4755..86a85a533 100644
Binary files a/core/doc/techdoc/techdoc.pdf and b/core/doc/techdoc/techdoc.pdf differ
diff --git a/core/doc/techdoc/techdoc.tex b/core/doc/techdoc/techdoc.tex
index fb4388254..eb00b6454 100644
--- a/core/doc/techdoc/techdoc.tex
+++ b/core/doc/techdoc/techdoc.tex
@@ -93,10 +93,10 @@
 \begin{center}
 {\LARGE\bf OpenRocket technical documentation}
 
-{\large For OpenRocket version 1.1.6}
+{\large For OpenRocket version 13.05}
 
 \vspace{-3mm}
-2011-07-18
+2013-05-10
 
 \vspace{10mm}
 {\Large Sampo Niskanen}
@@ -150,9 +150,11 @@ OpenRocket website, \url{http://openrocket.sourceforge.net/}.
 \begin{tabular}{lp{120mm}}
 2010-04-06 & Initial revision.  Updates the roll angle effect on three- and
 four-fin configurations in Section~\ref{update-roll-angle}.
-(OpenRocket software 1.0.0) \\
+(OpenRocket 1.0.0) \\
 2011-07-18 & Updated Chapter~\ref{chap-software} for updates in the
-software.  (OpenRocket software 1.1.6) \\
+software.  (OpenRocket 1.1.6) \\
+2013-05-10 & Added Section~\ref{sec-tumbling-bodies} with drag
+estimation of tumbling bodies.  (OpenRocket 13.05)
 \end{tabular}
 \end{center}
 
diff --git a/core/web/html/documentation.html b/core/web/html/documentation.html
index c4e340b48..9a3542c01 100644
--- a/core/web/html/documentation.html
+++ b/core/web/html/documentation.html
@@ -65,7 +65,7 @@
     <div class="separated">
       <p>
 	<span class="licenseimage"><a rel="license" href="http://creativecommons.org/licenses/by-sa/3.0/"><img alt="CC BY-SA" src="cc-by-sa-80x15.png" /></a></span>
-	<a href="techdoc.pdf">OpenRocket technical documentation</a> (2011-07-18)
+	<a href="techdoc.pdf">OpenRocket technical documentation</a> (2013-05-10)
 	&nbsp;&nbsp; <span class="note">(PDF&nbsp;1.4MB)</span>
       </p>
       <p>
diff --git a/core/web/html/download.html b/core/web/html/download.html
index d9eeeaaa3..a980f92b0 100644
--- a/core/web/html/download.html
+++ b/core/web/html/download.html
@@ -127,9 +127,9 @@
       <a href="https://sourceforge.net/projects/openrocket/files/openrocket/">SourceForge repository</a>.</p>
     <p>Alternatively, the most recent development version can be
       obtained from
-      <a href="https://github.com/plaa/openrocket/">GitHub</a>.
+      <a href="https://github.com/openrocket/openrocket/">GitHub</a>.
       The code can be retrieved using the command</p>
-    <pre class="quote">$ git clone git://github.com/plaa/openrocket.git</pre>
+    <pre class="quote">$ git clone git://github.com/openrocket/openrocket.git</pre>
     <p>The above URL may be used to connect to the repository with
       other Git clients as well.</p>
   </div>
diff --git a/core/web/html/techdoc.pdf b/core/web/html/techdoc.pdf
index ffb4aada5..86a85a533 100644
Binary files a/core/web/html/techdoc.pdf and b/core/web/html/techdoc.pdf differ
diff --git a/core/web/htp/documentation.htp b/core/web/htp/documentation.htp
index 1731f3f3e..b3b42e2ed 100644
--- a/core/web/htp/documentation.htp
+++ b/core/web/htp/documentation.htp
@@ -32,7 +32,7 @@
     <div class="separated">
       <p>
 	<span class="licenseimage"><a rel="license" href="http://creativecommons.org/licenses/by-sa/3.0/"><img alt="CC BY-SA" src="cc-by-sa-80x15.png" /></a></span>
-	<a href="techdoc.pdf">OpenRocket technical documentation</a> (2011-07-18)
+	<a href="techdoc.pdf">OpenRocket technical documentation</a> (2013-05-10)
 	&nbsp;&nbsp; <span class="note">(PDF&nbsp;1.4MB)</span>
       </p>
 
diff --git a/core/web/htp/download.htp b/core/web/htp/download.htp
index abb6a8a00..a547c8aa2 100644
--- a/core/web/htp/download.htp
+++ b/core/web/htp/download.htp
@@ -79,9 +79,9 @@
     
     <p>Alternatively, the most recent development version can be 
       obtained from 
-      <a href="https://github.com/plaa/openrocket/">GitHub</a>.
+      <a href="https://github.com/openrocket/openrocket/">GitHub</a>.
       The code can be retrieved using the command</p>
-    <pre class="quote">$ git clone git://github.com/plaa/openrocket.git</pre>
+    <pre class="quote">$ git clone git://github.com/openrocket/openrocket.git</pre>
     <p>The above URL may be used to connect to the repository with
       other Git clients as well.</p>