In for example Perl 5.005, this gets executes without problems:

#!/usr/bin/perl -w

use strict;

my @ary = qw(one two three);
my %hash = (one => "One", two => "Two", three => "Three");

print @ary->[0];
print %hash->{one};
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Perl 5.005 doesn't complain at all, but 5.8.0 (rightly) complains about it. Use either arrays (hashes) or array (hash) references, and not some weird mix of the 2.

Arjen