diff --git a/docs/html/sdk/1.0_r1/requirements.jd b/docs/html/sdk/1.0_r1/requirements.jd
index af0667548dccb..4163513174c23 100644
--- a/docs/html/sdk/1.0_r1/requirements.jd
+++ b/docs/html/sdk/1.0_r1/requirements.jd
@@ -14,7 +14,13 @@ developing Android applications using the Android SDK tools included in Android
 <ul>
   <li>Windows XP or Vista</li>
   <li>Mac OS X 10.4.8 or later (x86 only)</li>
-  <li>Linux (tested on Linux Ubuntu Dapper Drake)</li>
+  <li>Linux (tested on Linux Ubuntu Dapper Drake)
+    <ul>
+      <li>64-bit distributions must be capable of running 32-bit applications. 
+      For information about how to add support for 32-bit applications, see
+      the <a href="installing.html#installnotes">Installation Notes</a>.</li>
+    </ul>
+  </li>
 </ul>
 
 <h4>Supported Development Environments:</h4>
diff --git a/docs/html/sdk/1.0_r2/requirements.jd b/docs/html/sdk/1.0_r2/requirements.jd
index 74d90ef0a3322..4f7c093cad5f3 100644
--- a/docs/html/sdk/1.0_r2/requirements.jd
+++ b/docs/html/sdk/1.0_r2/requirements.jd
@@ -13,7 +13,13 @@ sdk.version=1.0_r2
 <ul>
   <li>Windows XP or Vista</li>
   <li>Mac OS X 10.4.8 or later (x86 only)</li>
-  <li>Linux (tested on Linux Ubuntu Dapper Drake)</li>
+  <li>Linux (tested on Linux Ubuntu Dapper Drake)
+    <ul>
+      <li>64-bit distributions must be capable of running 32-bit applications. 
+      For information about how to add support for 32-bit applications, see
+      the <a href="installing.html#installnotes">Installation Notes</a>.</li>
+    </ul>
+  </li>
 </ul>
 
 <h4>Supported Development Environments:</h4>
diff --git a/docs/html/sdk/1.1_r1/requirements.jd b/docs/html/sdk/1.1_r1/requirements.jd
index 95b658bea2037..9d8f9eb1e0967 100644
--- a/docs/html/sdk/1.1_r1/requirements.jd
+++ b/docs/html/sdk/1.1_r1/requirements.jd
@@ -11,7 +11,13 @@ sdk.date=February 2009
 <ul>
   <li>Windows XP (32-bit) or Vista (32- or 64-bit)</li>
   <li>Mac OS X 10.4.8 or later (x86 only)</li>
-  <li>Linux (tested on Linux Ubuntu Dapper Drake)</li>
+  <li>Linux (tested on Linux Ubuntu Dapper Drake)
+    <ul>
+      <li>64-bit distributions must be capable of running 32-bit applications. 
+      For information about how to add support for 32-bit applications, see
+      the <a href="installing.html#installnotes">Installation Notes</a>.</li>
+    </ul>
+  </li>
 </ul>
 
 <h3>Supported Development Environments</h3>
diff --git a/docs/html/sdk/1.5_r1/requirements.jd b/docs/html/sdk/1.5_r1/requirements.jd
index 4ed38a741261c..c10ccac561ea1 100644
--- a/docs/html/sdk/1.5_r1/requirements.jd
+++ b/docs/html/sdk/1.5_r1/requirements.jd
@@ -7,7 +7,13 @@ page.title=System Requirements
 <ul>
   <li>Windows XP (32-bit) or Vista (32- or 64-bit)</li>
   <li>Mac OS X 10.4.8 or later (x86 only)</li>
-  <li>Linux (tested on Linux Ubuntu Dapper Drake)</li>
+  <li>Linux (tested on Linux Ubuntu Dapper Drake)
+    <ul>
+      <li>64-bit distributions must be capable of running 32-bit applications. 
+      For information about how to add support for 32-bit applications, see
+      the <a href="installing.html#InstallationNotes">Installation Notes</a>.</li>
+    </ul>
+  </li>
 </ul>
 
 <h3>Supported Development Environments</h3>
diff --git a/docs/html/sdk/1.5_r2/requirements.jd b/docs/html/sdk/1.5_r2/requirements.jd
index 4ed38a741261c..c10ccac561ea1 100644
--- a/docs/html/sdk/1.5_r2/requirements.jd
+++ b/docs/html/sdk/1.5_r2/requirements.jd
@@ -7,7 +7,13 @@ page.title=System Requirements
 <ul>
   <li>Windows XP (32-bit) or Vista (32- or 64-bit)</li>
   <li>Mac OS X 10.4.8 or later (x86 only)</li>
-  <li>Linux (tested on Linux Ubuntu Dapper Drake)</li>
+  <li>Linux (tested on Linux Ubuntu Dapper Drake)
+    <ul>
+      <li>64-bit distributions must be capable of running 32-bit applications. 
+      For information about how to add support for 32-bit applications, see
+      the <a href="installing.html#InstallationNotes">Installation Notes</a>.</li>
+    </ul>
+  </li>
 </ul>
 
 <h3>Supported Development Environments</h3>
diff --git a/docs/html/sdk/1.5_r3/requirements.jd b/docs/html/sdk/1.5_r3/requirements.jd
index 5f20cf1c0b944..5bcee27ed7534 100644
--- a/docs/html/sdk/1.5_r3/requirements.jd
+++ b/docs/html/sdk/1.5_r3/requirements.jd
@@ -10,7 +10,13 @@ page.title=System Requirements
 <ul>
   <li>Windows XP (32-bit) or Vista (32- or 64-bit)</li>
   <li>Mac OS X 10.4.8 or later (x86 only)</li>
-  <li>Linux (tested on Linux Ubuntu Dapper Drake)</li>
+  <li>Linux (tested on Linux Ubuntu Dapper Drake)
+    <ul>
+      <li>64-bit distributions must be capable of running 32-bit applications. 
+      For information about how to add support for 32-bit applications, see
+      the <a href="installing.html#InstallationNotes">Installation Notes</a>.</li>
+    </ul>
+  </li>
 </ul>
 
 <h3>Supported Development Environments</h3>
diff --git a/docs/html/sdk/1.6_r1/requirements.jd b/docs/html/sdk/1.6_r1/requirements.jd
index 8e698fa5b4b2b..8cfc0494b820b 100644
--- a/docs/html/sdk/1.6_r1/requirements.jd
+++ b/docs/html/sdk/1.6_r1/requirements.jd
@@ -11,7 +11,13 @@ Android applications using the Android SDK tools included in Android
 <ul>
   <li>Windows XP (32-bit) or Vista (32- or 64-bit)</li>
   <li>Mac OS X 10.4.8 or later (x86 only)</li>
-  <li>Linux (tested on Linux Ubuntu Hardy Heron)</li>
+  <li>Linux (tested on Linux Ubuntu Hardy Heron)
+    <ul>
+      <li>64-bit distributions must be capable of running 32-bit applications. 
+      For information about how to add support for 32-bit applications, see
+      the <a href="installing.html#InstallationNotes">Installation Notes</a>.</li>
+    </ul>
+  </li>
 </ul>
 
 <h3>Supported Development Environments</h3>
diff --git a/docs/html/sdk/RELEASENOTES.jd b/docs/html/sdk/RELEASENOTES.jd
index 130a92c32fb0d..0dcafd301c33e 100644
--- a/docs/html/sdk/RELEASENOTES.jd
+++ b/docs/html/sdk/RELEASENOTES.jd
@@ -24,6 +24,11 @@ your <a href="{@docRoot}guide/developing/tools/avd.html">Android Virtual
 Devices</a> and download new SDK packages (such as platform versions and 
 add-ons) into your environment.</li>
     <li>Improved support for test packages in New Project Wizard</li>
+    <li>The reference documentation now offers a "Filter by API Level" 
+capability that lets you display only the parts of the API that are actually 
+available to your application, based on the <code>android:minSdkVersion</code>
+value the application declares in its manifest. For more information, see
+<a href="{@docRoot}guide/appendix/api-levels.html">Android API Levels</a></li>
   </ul>
 
 <p>For details about the Android platforms included in the SDK &mdash; including
@@ -71,8 +76,8 @@ Your Eclipse Plugin</a>. </p>
 
 <h3>Android SDK and AVD Manager</h3>
 
-<p>The SDK offers a new tool called Android AVD Manager that lets you manage
-your SDK and AVD environments more efficiently. </p>
+<p>The SDK offers a new tool called Android SDK and AVD Manager that lets you 
+manage your SDK and AVD environments more efficiently. </p>
 
 <p>Using the tool, you can quickly check what Android platforms, add-ons,
 extras, and documentation packages are available in your SDK environment, what
@@ -181,7 +186,7 @@ skins, including: </p>
 <p>Besides these defaults, You can also create an AVD that overrides the default
 density for each skin, to create any combination of resolution/density (WVGA
 with medium density, for instance).  To do so, use the <code>android</code> tool
-command line to create a new AVD that uses a custom hardare configuration. See
+command line to create a new AVD that uses a custom hardware configuration. See
 <a href="{@docRoot}guide/developing/tools/avd.html#createavd">Creating an
 AVD</a> for more information.</p>