diff --git a/download.html b/download.html
index 84856e0da5ef40da706886ef2b19f67ca62fdf28_ZG93bmxvYWQuaHRtbA==..3ff3436a1b7ae223e285c660ccdd37c29080d41f_ZG93bmxvYWQuaHRtbA== 100644
--- a/download.html
+++ b/download.html
@@ -74,5 +74,5 @@
 performance improvements.</p>
 <p>We provide binaries for x86 and ARM Linux, Mac OS/X and Windows for:</p>
 <ul class="simple">
-<li>the Python2.7 compatible release — <strong>PyPy 2.5.1</strong> — (<a class="reference external" href="http://doc.pypy.org/en/latest/release-2.5.1.html">what's new in PyPy 2.5.1?</a> )</li>
+<li>the Python2.7 compatible release — <strong>PyPy 2.5.1</strong> — (<a class="reference external" href="http://doc.pypy.org/en/latest/release-2.5.1.html">what's new in PyPy 2.5.1?</a>)</li>
 <li>the Python3.2.5 compatible release — <strong>PyPy3 2.4.0</strong> — (<a class="reference external" href="http://doc.pypy.org/en/latest/release-pypy3-2.4.0.html">what's new in PyPy3 2.4.0?</a>).</li>
@@ -78,4 +78,5 @@
 <li>the Python3.2.5 compatible release — <strong>PyPy3 2.4.0</strong> — (<a class="reference external" href="http://doc.pypy.org/en/latest/release-pypy3-2.4.0.html">what's new in PyPy3 2.4.0?</a>).</li>
+<li>the Python2.7 Software Transactional Memory special release — <strong>PyPy-STM 2.5.1</strong> (Linux x86-64 only)</li>
 </ul>
 <ul class="download-menu simple">
 <li>Download<ul>
@@ -153,6 +154,14 @@
 libraries: &#8230;</tt>.  Unless you want to hack a lot, try out the
 <a class="reference external" href="https://github.com/squeaky-pl/portable-pypy">portable Linux binaries</a>.</p>
 </div>
+<div class="section" id="pypy-stm-2-5-1">
+<h1>PyPy-STM 2.5.1</h1>
+<p>This is a special version of PyPy!  See the <a class="reference external" href="http://doc.pypy.org/en/latest/stm.html">Software Transactional
+Memory</a> (STM) documentation.</p>
+<ul class="simple">
+<li><a class="reference external" href="https://bitbucket.org/pypy/pypy/downloads/pypy-stm-2.5.1-linux64.tar.bz2">PyPy-STM Linux x86-64 binary (64bit, tar.bz2 built on Ubuntu 12.04 - 14.04)</a></li>
+</ul>
+</div>
 <div class="section" id="other-versions">
 <span id="other-versions-without-a-jit"></span><h1>Other versions</h1>
 <p>The other versions of PyPy are:</p>
diff --git a/source/download.txt b/source/download.txt
index 84856e0da5ef40da706886ef2b19f67ca62fdf28_c291cmNlL2Rvd25sb2FkLnR4dA==..3ff3436a1b7ae223e285c660ccdd37c29080d41f_c291cmNlL2Rvd25sb2FkLnR4dA== 100644
--- a/source/download.txt
+++ b/source/download.txt
@@ -14,6 +14,6 @@
 
 We provide binaries for x86 and ARM Linux, Mac OS/X and Windows for:
 
-* the Python2.7 compatible release — **PyPy 2.5.1** — (`what's new in PyPy 2.5.1?`_ )
+* the Python2.7 compatible release — **PyPy 2.5.1** — (`what's new in PyPy 2.5.1?`_)
 * the Python3.2.5 compatible release — **PyPy3 2.4.0** — (`what's new in PyPy3 2.4.0?`_).
 
@@ -18,5 +18,7 @@
 * the Python3.2.5 compatible release — **PyPy3 2.4.0** — (`what's new in PyPy3 2.4.0?`_).
 
+* the Python2.7 Software Transactional Memory special release — **PyPy-STM 2.5.1** (Linux x86-64 only)
+
 .. _what's new in PyPy 2.5.1?: http://doc.pypy.org/en/latest/release-2.5.1.html
 .. _what's new in PyPy3 2.4.0?: http://doc.pypy.org/en/latest/release-pypy3-2.4.0.html
 
@@ -138,6 +140,18 @@
 `portable Linux binaries`_.
 
 
+PyPy-STM 2.5.1
+------------------------------
+
+This is a special version of PyPy!  See the `Software Transactional
+Memory`_ (STM) documentation.
+
+* `PyPy-STM Linux x86-64 binary (64bit, tar.bz2 built on Ubuntu 12.04 - 14.04)`__
+
+.. _`Software Transactional Memory`: http://doc.pypy.org/en/latest/stm.html
+.. __: https://bitbucket.org/pypy/pypy/downloads/pypy-stm-2.5.1-linux64.tar.bz2
+
+
 .. _`Other versions (without a JIT)`:
 
 Other versions