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diff --git a/pod/perldiag.pod b/pod/perldiag.pod
index 5baacc8..baa088c 100644
--- a/pod/perldiag.pod
+++ b/pod/perldiag.pod
@@ -76,6 +76,13 @@ on the operator (e.g. C<CORE::log($x)>) or by declaring the subroutine
 to be an object method (see L<perlsub/"Subroutine Attributes"> or
 L<attributes>).
 
+=item Ambiguous range in transliteration operator
+
+(F) You wrote something like C<tr/a-z-0//> which doesn't mean anything at
+all.  To include a C<-> character in a transliteration, put it either
+first or last.  (In the past, C<tr/a-z-0//> was synonymous with
+C<tr/a-y//>, which was probably not what you would have expected.)
+
 =item Ambiguous use of %s resolved as %s
 
 (W ambiguous)(S) You said something that may not be interpreted the way
@@ -747,6 +754,12 @@ the file, say, by doing C<make install>.
 functioning as a class, but that package doesn't define that particular
 method, nor does any of its base classes.  See L<perlobj>.
 
+=item (perhaps you forgot to load "%s"?)
+
+(F) This is an educated guess made in conjunction with the message
+"Can't locate object method \"%s\" via package \"%s\"".  It often means
+that a method requires a package that has not been loaded.
+
 =item Can't locate package %s for @%s::ISA
 
 (W syntax) The @ISA array contained the name of another package that
@@ -1018,23 +1031,23 @@ Perhaps you need to copy the value to a temporary, and repeat that.
 I<inside> character classes, the [] are part of the construct, for
 example: /[012[:alpha:]345]/.  Note that [= =] and [. .] are not
 currently implemented; they are simply placeholders for future
-extensions.
+extensions and will cause fatal errors.
 
 =item Character class syntax [. .] is reserved for future extensions
 
-(W regexp) Within regular expression character classes ([]) the syntax
+(F regexp) Within regular expression character classes ([]) the syntax
 beginning with "[." and ending with ".]" is reserved for future
-extensions.  If you need to represent those character sequences inside a
-regular expression character class, just quote the square brackets with
-the backslash: "\[." and ".\]".
+extensions.  If you need to represent those character sequences inside
+a regular expression character class, just quote the square brackets
+with the backslash: "\[." and ".\]".
 
 =item Character class syntax [= =] is reserved for future extensions
 
-(W regexp) Within regular expression character classes ([]) the syntax
+(F) Within regular expression character classes ([]) the syntax
 beginning with "[=" and ending with "=]" is reserved for future
-extensions.  If you need to represent those character sequences inside a
-regular expression character class, just quote the square brackets with
-the backslash: "\[=" and "=\]".
+extensions.  If you need to represent those character sequences inside
+a regular expression character class, just quote the square brackets
+with the backslash: "\[=" and "=\]".
 
 =item Character class [:%s:] unknown
 
@@ -1075,7 +1088,7 @@ arbitrarily.  ("Simple" and "medium" situations are handled without
 recursion and are not subject to a limit.)  Try shortening the string
 under examination; looping in Perl code (e.g. with C<while>) rather than
 in the regular expression engine; or rewriting the regular expression so
-that it is simpler or backtracks less.  (See L<perlbook> for information
+that it is simpler or backtracks less.  (See L<perlfaq2> for information
 on I<Mastering Regular Expressions>.)
 
 =item connect() on closed socket %s
@@ -1691,6 +1704,11 @@ L<perlfunc/sprintf>.
 (F) The range specified in a character class had a minimum character
 greater than the maximum character.  See L<perlre>.
 
+=item invalid [] range "%s" in transliteration operator
+
+(F) The range specified in the tr/// or y/// operator had a minimum
+character greater than the maximum character.  See L<perlop>.
+
 =item Invalid separator character %s in attribute list
 
 (F) Something other than a colon or whitespace was seen between the