in from another command is not UTF-8, Perl will complain about the
malformed UTF-8.
+All features that combine Unicode and I/O also require using the new
+PerlIO feature. Almost all Perl 5.8 platforms do use PerlIO, though:
+you can see whether yours is by running "perl -V" and looking for
+C<useperlio=define>.
+
=head2 Unicode and EBCDIC
Perl 5.8.0 also supports Unicode on EBCDIC platforms. There,
explicitly opening also the F<file> for input as UTF-8.
B<NOTE>: the C<:utf8> and C<:encoding> features work only if your
-Perl has been built with the new "perlio" feature. Almost all
-Perl 5.8 platforms do use "perlio", though: you can see whether
-yours is by running "perl -V" and looking for C<useperlio=define>.
+Perl has been built with the new PerlIO feature.
=head2 Displaying Unicode As Text