diff --git a/INSTALL b/INSTALL
index 1d3a6f217..034ce530d 100644
--- a/INSTALL
+++ b/INSTALL
@@ -18,8 +18,8 @@ If you want to convert the XML to HTML, install the following:
 * libxslt
   - https://www.linuxfromscratch.org/blfs/view/svn/general/libxslt.html
 
-* DocBook DTD
-  - https://www.linuxfromscratch.org/blfs/view/svn/pst/xml.html
+* DocBook 4.5 XML DTD
+  - https://www.linuxfromscratch.org/blfs/view/svn/pst/docbook.html
 
 * DocBook XSL Stylesheets
   - https://www.linuxfromscratch.org/blfs/view/svn/pst/docbook-xsl.html
diff --git a/chapter03/introduction.xml b/chapter03/introduction.xml
index ba7e16366..c0a89afac 100644
--- a/chapter03/introduction.xml
+++ b/chapter03/introduction.xml
@@ -13,12 +13,21 @@
   <para>This chapter includes a list of packages that need to be downloaded in
   order to build a basic Linux system. The listed version numbers correspond to
   versions of the software that are known to work, and this book is based on
-  their use. We highly recommend against using newer versions because the build
-  commands for one version may not work with a newer version. The newest package
+  their use. We highly recommend against using different versions because the build
+  commands for one version may not work with a different version. The newest package
   versions may also have problems that require work-arounds. These work-arounds
   will be developed and stabilized in the development version of the
   book.</para>
 
+  <para>For some packages, the release tarball and the (Git or SVN)
+  repository snapshot tarball for this release may be published with
+  similar file name.  A release tarball contains generated files (for
+  example, <command>configure</command> script generated by
+  <command>autoconf</command>), in addition to the contents of the
+  corresponding repository snapshot.  The book uses release tarballs
+  whenever possible. Using a repository snapshot instead of a release
+  tarball specified by the book will cause problems.</para>
+
   <para>Download locations may not always be accessible. If a download
   location has changed since this book was published, Google (<ulink
   url="http://www.google.com/"/>) provides a useful search engine for
diff --git a/chapter08/glibc.xml b/chapter08/glibc.xml
index 27a102710..094e4ad2c 100644
--- a/chapter08/glibc.xml
+++ b/chapter08/glibc.xml
@@ -172,12 +172,13 @@ esac</userinput></screen>
         <para><emphasis>misc/tst-ttyname</emphasis>
         is known to fail in the LFS chroot environment.</para>
       </listitem>
-<!--
+
       <listitem>
         <para>The <emphasis>nss/tst-nss-files-hosts-multi</emphasis>
-        test may fail for reasons that have not been determined.</para>
+        test is known to fail if the system has no non-loopback IP
+        addresses.</para>
       </listitem>
-
+<!--
       <listitem>
         <para>The <emphasis>rt/tst-cputimer{1,2,3}</emphasis> tests depend on
         the host system kernel. Kernels 4.14.91&ndash;4.14.96,
diff --git a/part3intro/generalinstructions.xml b/part3intro/generalinstructions.xml
index 0739f79cc..d8e280e0d 100644
--- a/part3intro/generalinstructions.xml
+++ b/part3intro/generalinstructions.xml
@@ -97,6 +97,12 @@
               to be built.  In <xref linkend="chapter-cross-tools"/> and
               <xref linkend="chapter-temporary-tools"/>, ensure you are
               the <emphasis>lfs</emphasis> user when extracting the package.</para>
+              <para>All methods to get the source code tree being built
+              in-position, except extracting the package tarball, are not
+              supported. Notably, using <command>cp -R</command> to copy the
+              source code tree somewhere else can destroy links and
+              timestamps in the sources tree and cause building
+              failure.</para>
             </listitem>
             <listitem>
               <para>Change to the directory created when the package was