I think the problem is in Parse::CPAN::Meta, seems to be a lot of changes here:

--- Meta.pm    2014-03-04 15:22:05.000000000 -0500
+++ /u01/oracle/Meta.pm    2014-04-10 11:24:46.069085636 -0400
@@ -2,7 +2,7 @@ use 5.008001;
 use strict;
 package Parse::CPAN::Meta;
 # ABSTRACT: Parse META.yml and META.json CPAN metadata files
-our $VERSION = '1.4414'; # VERSION
+our $VERSION = '1.4413'; # VERSION
 
 use Exporter;
 use Carp 'croak';
@@ -13,30 +13,15 @@ our @EXPORT_OK = qw/Load LoadFile/;
 sub load_file {
   my ($class, $filename) = @_;
 
-  my $meta = _slurp($filename);
-
   if ($filename =~ /\.ya?ml$/) {
-    return $class->load_yaml_string($meta);
-  }
-  elsif ($filename =~ /\.json$/) {
-    return $class->load_json_string($meta);
-  }
-  else {
-    $class->load_string($meta); # try to detect yaml/json
+    return $class->load_yaml_string(_slurp($filename));
   }
-}
 
-sub load_string {
-  my ($class, $string) = @_;
-  if ( $string =~ /^---/ ) { # looks like YAML
-    return $class->load_yaml_string($string);
-  }
-  elsif ( $string =~ /^\s*\{/ ) { # looks like JSON
-    return $class->load_json_string($string);
-  }
-  else { # maybe doc-marker-free YAML
-    return $class->load_yaml_string($string);
+  if ($filename =~ /\.json$/) {
+    return $class->load_json_string(_slurp($filename));
   }
+
+  croak("file type cannot be determined by filename");
 }
 
 sub load_yaml_string {
@@ -136,7 +121,7 @@ Parse::CPAN::Meta - Parse META.yml and M
 
 =head1 VERSION
 
-version 1.4414
+version 1.4413
 
 =head1 SYNOPSIS
 
@@ -216,13 +201,6 @@ This method deserializes the given strin
 If the source was UTF-8 encoded, the string must be decoded before ca
+lling
 C<load_json_string>.
 
-=head2 load_string
-
-  my $metadata_structure = Parse::CPAN::Meta->load_string($some_strin
+g);
-
-If you don't know whether a string contains YAML or JSON data, this m
+ethod
-will use some heuristics and guess.  If it can't tell, it assumes YAM
+L.
-
 =head2 yaml_backend
 
   my $backend = Parse::CPAN::Meta->yaml_backend;
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Will see if I can trouble shoot further. Any suggestions appreciated.