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diff --git a/INSTALL b/INSTALL
index 719c2fe..1ea3e7b 100644
--- a/INSTALL
+++ b/INSTALL
@@ -319,7 +319,15 @@ It may seem obvious, but Perl is useful only when users can easily
 find it.  It's often a good idea to have both /usr/bin/perl and
 /usr/local/bin/perl be symlinks to the actual binary.  Be especially
 careful, however, not to overwrite a version of perl supplied by your
-vendor unless you are sure you know what you are doing.
+vendor unless you are sure you know what you are doing.  If you insist
+on replacing your vendor's perl, useful information on how it was
+configured may be found with
+
+	perl -V:config_args
+
+(Check the output carefully, however, since this doesn't preserve
+spaces in arguments to Configure.  For that, you have to look
+carefully at config_arg1, config_arg2, etc.)
 
 By default, Configure will not try to link /usr/bin/perl to
 the current version of perl.  You can turn on that behavior by running
@@ -1512,6 +1520,15 @@ explicitly above.
 
 This will attempt to make perl in the current directory.
 
+=head2 Expected errors
+
+These errors are normal, and can be ignored:
+
+  ...
+  make: [extra.pods] Error 1 (ignored)
+  ...
+  make: [extras.make] Error 1 (ignored)
+
 =head2 What if it doesn't work?
 
 If you can't compile successfully, try some of the following ideas.