C:\...>perl perlmonks2.pl
isutf8 test 1: ok
isutf8 test 2: nope
-d test 1: nope
-d test 2: ok
opendir test 1: nope
opendir test 2: ok
dir test 1: nope
dir test 2: ok
dir test 1: nope
dir test 2: ok
C:\...>