diff --git a/lib/config.tmpl b/lib/config.tmpl
index 3cee71adb2ce9cd3cfb944562b4430bb21b49cf6_bGliL2NvbmZpZy50bXBs..93bbb24514aeeed48ca592610e4bb2f76eecdcbb_bGliL2NvbmZpZy50bXBs 100644
--- a/lib/config.tmpl
+++ b/lib/config.tmpl
@@ -26,7 +26,7 @@
 [% download_mac_mb = 34 %]
 
 [% betabaseversion = '2.13' %]
-[% betabetaversion = '4' %]
+[% betabetaversion = '5' %]
 [% betaversion = "${betabaseversion}b${betabetaversion}" %]
 [% betaname = "SeaMonkey ${betabaseversion} Beta ${betabetaversion}" %]
 
diff --git a/lib/sitemap.xml b/lib/sitemap.xml
index 3cee71adb2ce9cd3cfb944562b4430bb21b49cf6_bGliL3NpdGVtYXAueG1s..93bbb24514aeeed48ca592610e4bb2f76eecdcbb_bGliL3NpdGVtYXAueG1s 100644
--- a/lib/sitemap.xml
+++ b/lib/sitemap.xml
@@ -13,8 +13,8 @@
   <page url="news" title="News" id="news" />
 
   <page url="releases/" title="Download and Releases" id="releases">
-    <page url="releases/2.13b4" title="2.13 Beta 4" id="2.13b4" hide="false">
+    <page url="releases/2.13b5" title="2.13 Beta 5" id="2.13b5" hide="false">
       <page url="releases/seamonkey2.13/" title="Release Notes" id="seamonkey2.13">
         <page url="releases/seamonkey2.13/changes" title="What's New" id="seamonkey2.13-changes" />
       </page>
     </page>
@@ -17,7 +17,8 @@
       <page url="releases/seamonkey2.13/" title="Release Notes" id="seamonkey2.13">
         <page url="releases/seamonkey2.13/changes" title="What's New" id="seamonkey2.13-changes" />
       </page>
     </page>
+    <page url="releases/2.13b4" title="2.13 Beta 4" id="2.13b4" hide="true" />
     <page url="releases/2.13b3" title="2.13 Beta 3" id="2.13b3" hide="true" />
     <page url="releases/2.13b2" title="2.13 Beta 2" id="2.13b2" hide="true" />
     <page url="releases/2.13b1" title="2.13 Beta 1" id="2.13b1" hide="true" />
diff --git a/src/news.en.xml b/src/news.en.xml
index 3cee71adb2ce9cd3cfb944562b4430bb21b49cf6_c3JjL25ld3MuZW4ueG1s..93bbb24514aeeed48ca592610e4bb2f76eecdcbb_c3JjL25ld3MuZW4ueG1s 100644
--- a/src/news.en.xml
+++ b/src/news.en.xml
@@ -7,7 +7,20 @@
 -->
 
 <newsfeed title="SeaMonkey News" url="http://seamonkey-project.org/news">
-  <entry id="2012-09-23" showfront="true">
+  <entry id="2012-09-29" showfront="true">
+    <headline>SeaMonkey 2.13 Beta 5</headline>
+    <content type="html" xml:lang="en">
+<![CDATA[<p>
+SeaMonkey 2.13 Beta 5 is
+<a href="http://www.seamonkey-project.org/releases/2.13b5">now available
+for free download</a> on the SeaMonkey website. We encourage testers to
+<a href="http://www.seamonkey-project.org/dev/get-involved">get involved</a> in
+discussing and reporting problems as well as further improving the product.
+</p>]]>
+    </content>
+  </entry>
+
+  <entry id="2012-09-23" showfront="false">
     <headline>SeaMonkey 2.13 Beta 4</headline>
     <content type="html" xml:lang="en">
 <![CDATA[<p>
diff --git a/src/releases/2.13b4.en.html b/src/releases/2.13b4.en.html
index 3cee71adb2ce9cd3cfb944562b4430bb21b49cf6_c3JjL3JlbGVhc2VzLzIuMTNiNC5lbi5odG1s..93bbb24514aeeed48ca592610e4bb2f76eecdcbb_c3JjL3JlbGVhc2VzLzIuMTNiNC5lbi5odG1s 100755
--- a/src/releases/2.13b4.en.html
+++ b/src/releases/2.13b4.en.html
@@ -2,7 +2,7 @@
 [%- smversion = '2.13b4' -%]
 [%- prettyversion = '2.13 Beta 4' -%]
 [%- relnoteversion = '2.13' -%]
-[%- mirrorred = true -%]
+[%- mirrorred = false -%]
 [%- uselongversion = false -%]
 [%- releasedate = "September 23, 2012" -%]
 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
@@ -24,10 +24,10 @@
 <p class="release-date">Released [% releasedate %]</p>
 
 <div class="important">
-  <strong class="shout">Be careful!</strong> The SeaMonkey version available for
-  download on this page is a testing-only preview of the next generation of our
-  Internet suite. Please test it carefully, it's not yet in a state where we can
-  encourage you to use it for daily browsing and mail operations.
+  <strong class="very-strong shout">Warning!</strong> The SeaMonkey version
+  available for download on this page is an outdated testing-only preview of
+  the next generation of our Internet suite. Please test a
+  <a href="[% betaversion %]">newer preview version</a> instead of this one.
   <br>For daily use, we strongly advise you to download the
   <a href="./">current stable release</a> instead.
 </div>
diff --git a/src/releases/2.13b5.en.html b/src/releases/2.13b5.en.html
index 3cee71adb2ce9cd3cfb944562b4430bb21b49cf6_c3JjL3JlbGVhc2VzLzIuMTNiNS5lbi5odG1s..93bbb24514aeeed48ca592610e4bb2f76eecdcbb_c3JjL3JlbGVhc2VzLzIuMTNiNS5lbi5odG1s 100755
--- a/src/releases/2.13b5.en.html
+++ b/src/releases/2.13b5.en.html
@@ -4,7 +4,7 @@
 [%- relnoteversion = '2.13' -%]
 [%- mirrorred = true -%]
 [%- uselongversion = false -%]
-[%- releasedate = "September 28, 2012" -%]
+[%- releasedate = "September 29, 2012" -%]
 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
 <html lang="en">
 <head>
diff --git a/src/releases/index.en.html b/src/releases/index.en.html
index 3cee71adb2ce9cd3cfb944562b4430bb21b49cf6_c3JjL3JlbGVhc2VzL2luZGV4LmVuLmh0bWw=..93bbb24514aeeed48ca592610e4bb2f76eecdcbb_c3JjL3JlbGVhc2VzL2luZGV4LmVuLmh0bWw= 100644
--- a/src/releases/index.en.html
+++ b/src/releases/index.en.html
@@ -5,7 +5,7 @@
 [%- mirrorred = true -%]
 [%- uselongversion = false -%]
 [%- releasedate = "September 10, 2012" -%]
-[%- betareleasedate = "September 23, 2012" -%]
+[%- betareleasedate = "September 29, 2012" -%]
 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
 <html lang="en">
 <head>
@@ -468,7 +468,8 @@
 <div class="para" id="old">
   <p>Previously released versions of SeaMonkey:</p>
   <ul class="snav">
-    <!--<li><a href="2.13b4">2.13 Beta 4</a></li>-->
+    <!--<li><a href="2.13b5">2.13 Beta 5</a></li>-->
+    <li><a href="2.13b4">2.13 Beta 4</a></li>
     <li><a href="2.13b3">2.13 Beta 3</a></li>
     <!--<li><a href="2.12.1">2.12.1</a></li>-->
     <li><a href="2.13b2">2.13 Beta 2</a></li>
diff --git a/src/releases/seamonkey2.13/changes.en.html b/src/releases/seamonkey2.13/changes.en.html
index 3cee71adb2ce9cd3cfb944562b4430bb21b49cf6_c3JjL3JlbGVhc2VzL3NlYW1vbmtleTIuMTMvY2hhbmdlcy5lbi5odG1s..93bbb24514aeeed48ca592610e4bb2f76eecdcbb_c3JjL3JlbGVhc2VzL3NlYW1vbmtleTIuMTMvY2hhbmdlcy5lbi5odG1s 100755
--- a/src/releases/seamonkey2.13/changes.en.html
+++ b/src/releases/seamonkey2.13/changes.en.html
@@ -28,6 +28,7 @@
   <li><a href="#new">New Features and Fixes</a>
     <ul>
       <li><a href="#major">Major Changes</a></li>
+      <li><a href="#fixesB5">Fixes in Beta 5</a></li>
       <li><a href="#fixesB4">Fixes in Beta 4</a></li>
       <li><a href="#fixesB3">Fixes in Beta 3</a></li>
       <li><a href="#fixesB2">Fixes in Beta 2</a></li>
@@ -49,6 +50,19 @@
 </div>
 
 <div class="fieldset">
+<span class="legend" id="fixesB5">Fixes in Beta 5</span>
+<ul>
+  <li>Idle MailNews databases were closed too frequently, limiting the
+    benefit of the database cache (<a
+    href="https://bugzilla.mozilla.org/show_bug.cgi?id=793455">bug 793455</a>).</li>
+  <li>Certain MailNews feed subscribes could fail (<a
+    href="https://bugzilla.mozilla.org/show_bug.cgi?id=790554">bug 790554</a>).</li>
+  <li>A deleted message template displayed an incorrect message body (<a
+    href="https://bugzilla.mozilla.org/show_bug.cgi?id=786595">bug 786595</a>).</li>
+</ul>
+</div>
+
+<div class="fieldset">
 <span class="legend" id="fixesB4">Fixes in Beta 4</span>
 <ul>
   <li>The tab bar grabbed focus after switching the active tab (<a
diff --git a/src/releases/seamonkey2.13/relnote.var b/src/releases/seamonkey2.13/relnote.var
index 3cee71adb2ce9cd3cfb944562b4430bb21b49cf6_c3JjL3JlbGVhc2VzL3NlYW1vbmtleTIuMTMvcmVsbm90ZS52YXI=..93bbb24514aeeed48ca592610e4bb2f76eecdcbb_c3JjL3JlbGVhc2VzL3NlYW1vbmtleTIuMTMvcmVsbm90ZS52YXI= 100755
--- a/src/releases/seamonkey2.13/relnote.var
+++ b/src/releases/seamonkey2.13/relnote.var
@@ -1,7 +1,7 @@
 [%- rnote.baseversion = "2.13" -%]
 [%- rnote.basename = "SeaMonkey 2.13" -%]
-[%- rnote.version = "2.13b4" -%]
-[%- rnote.name = "SeaMonkey 2.13 Beta 4" -%]
+[%- rnote.version = "2.13b5" -%]
+[%- rnote.name = "SeaMonkey 2.13 Beta 5" -%]
 [%- rnote.relativeto.version = "2.12" -%]
 [%- rnote.relativeto.name = "SeaMonkey 2.12" -%]
 [%- rnote.relativeto.stable.version = "2.12" -%]