"use utf8" still needed to enable UTF-8/UTF-EBCDIC in scripts
As a compatibility measure, the "use utf8" pragma must be explicitly included to enable 
recognition of UTF-8 in the Perl scripts themselves (in string or regular expression literals, 
or in identifier names) on ASCII-based machines or to recognize UTF-EBCDIC on EBCDIC-based
machines. 
These are the only times when an explicit "use utf8" is needed.  See utf8.