C<<<`...`> here-docs (with backticks as the delimiters) now call
C<readpipe> overrides. [perl #119827]
+=item *
+
+The presence of a lexical sub named "CORE" no longer stops the CORE::
+prefix from working.
+
=back
=head1 Known Problems
=item *
-XXX
+C<do CORE()> used to call a sub named "CORE" and treat its return value as
+a file name to execute. A bug fix inadvertently caused it to be
+interpreted as the deprecated "do-SUB" construct. (Yes, C<do
+I<bareword>()> is inconsistent.) This will likely be changed back.
=back