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diff --git a/pod/perlre.pod b/pod/perlre.pod
index c964be8..380bc5f 100644
--- a/pod/perlre.pod
+++ b/pod/perlre.pod
@@ -199,20 +199,26 @@ equivalents (if available) are as follows:
     alpha
     alnum
     ascii
+    blank		[1]
     cntrl
     digit       \d
     graph
     lower
     print
     punct
-    space       \s
+    space       \s	[2]
     upper
-    word        \w
+    word        \w	[3]
     xdigit
 
+  [1] A GNU extension equivalent to C<[ \t]>, `all horizontal whitespace'.
+  [2] Not I<exactly equivalent> to C<\s> since the C<[[:space:]]> includes
+      also the (very rare) `vertical tabulator', "\ck", chr(11).
+  [3] A Perl extension. 
+
 For example use C<[:upper:]> to match all the uppercase characters.
-Note that the C<[]> are part of the C<[::]> construct, not part of the whole
-character class.  For example:
+Note that the C<[]> are part of the C<[::]> construct, not part of the
+whole character class.  For example:
 
     [01[:alpha:]%]
 
@@ -224,6 +230,7 @@ If the C<utf8> pragma is used, the following equivalences to Unicode
     alpha       IsAlpha
     alnum       IsAlnum
     ascii       IsASCII
+    blank	IsSpace
     cntrl       IsCntrl
     digit       IsDigit
     graph       IsGraph
@@ -238,8 +245,8 @@ If the C<utf8> pragma is used, the following equivalences to Unicode
 For example C<[:lower:]> and C<\p{IsLower}> are equivalent.
 
 If the C<utf8> pragma is not used but the C<locale> pragma is, the
-classes correlate with the isalpha(3) interface (except for `word',
-which is a Perl extension, mirroring C<\w>).
+classes correlate with the usual isalpha(3) interface (except for
+`word' and `blank').
 
 The assumedly non-obviously named classes are:
 
@@ -353,7 +360,7 @@ everything before the matched string.  And C<$'> returns everything
 after the matched string.
 
 The numbered variables ($1, $2, $3, etc.) and the related punctuation
-set (C<<$+>, C<$&>, C<$`>, and C<$'>) are all dynamically scoped
+set (C<$+>, C<$&>, C<$`>, and C<$'>) are all dynamically scoped
 until the end of the enclosing block or until the next successful
 match, whichever comes first.  (See L<perlsyn/"Compound Statements">.)