sub br {print "\n"};

sub parse_datetime($)
{
 $_ =~ /(\d\d\d\d)-(\d\d)-(\d\d) (\d\d):(\d\d)/;
 return($1, $2, $3, $4, $5);
}

my @awarie = ('2009-11-13 13:48', '2009-11-13 16:58',
              '2009-11-13 19:23', '2009-11-13 23:13',
              '2009-11-16 15:31', '2009-11-16 21:41',
              '2009-11-17 16:21', '2009-11-17 21:06');

if ($DEBUG)
{
 print('@awarie'); br;
 print Dumper(@awarie);
 print('parse_datetime($awarie[$i])'); br;
 #foreach(@awarie)                        # Works
 for(my $k=0; $k<scalar(@awarie); $k++)   # Dosen't
 {
  #my ($y, $m, $d, $h, $mi) = parse_datetime($_);
  # ^^^^^^^^^^^^^^^^^^^^^^^^^ Works
  #my ($y, $m, $d, $h, $mi) = parse_datetime($awarie[$k]);
  # ^^^^^^^^^^^^^^^^^^^^^^^^^ Dosen't
   my ($y, $m, $d, $h, $mi) = parse_datetime($awarie[1]);
  # ^^^^^^^^^^^^^^^^^^^^^^^^^ Dosen't!
   print("$y-$m-$d $h:$mi"); br;
 }
}

if($DEBUG)
{
 print('@array size: ' . scalar(@awarie)); br; # Everything is correct
}

for(my $j=0; $j<scalar(@awarie); $j++)
{
 if($DEBUG) { print $awarie[$j] }; br;
 my ($yy, $mm, $dd, $phh, $pmi) = parse_datetime($awarie[$j++]);
 # ^^^ Nothing returned
 if($DEBUG) { print $awarie[$j] }; br;
 my ($kyy, $kmm, $kdd, $khh, $kmi) = parse_datetime($awarie[$j]);
 # ^^^ Ditto

 if($DEBUG)
 {
  print("$yy-$mm-$dd $phh:$pmi"); br;
  print("$kyy-$kmm-$kdd $khh:$kmi"); br;
  # Both print '--:'...
 }
# (...)
}