diff --git a/src/libprs500/ebooks/metadata/__init__.py b/src/libprs500/ebooks/metadata/__init__.py
index 6c999195fa..e29692347f 100644
--- a/src/libprs500/ebooks/metadata/__init__.py
+++ b/src/libprs500/ebooks/metadata/__init__.py
@@ -68,4 +68,4 @@ class MetaInformation(object):
         return ans.strip()
     
     def __nonzero__(self):
-        return self.title or self.author or self.comments or self.category
\ No newline at end of file
+        return bool(self.title or self.author or self.comments or self.category)
\ No newline at end of file
diff --git a/src/libprs500/ebooks/metadata/pdf-meta.pl b/src/libprs500/ebooks/metadata/pdf-meta.pl
deleted file mode 100644
index 991873045a..0000000000
--- a/src/libprs500/ebooks/metadata/pdf-meta.pl
+++ /dev/null
@@ -1,49 +0,0 @@
-#!/usr/bin/perl
-# Read/Write PDF meta data
-# Based on pdf-meta from http://www.osresearch.net/wiki/index.php/Pdf-meta
-
-use warnings;
-use strict;
-use PDF::API2;
-use Getopt::Long;
-use Data::Dumper;
-
-my %new_info = (Creator => 'libprs500.metadata', CreationDate  => scalar( localtime ),);
-
-GetOptions(
-        "c|creator=s"           => \$new_info{Creator},
-        "d|date=s"              => \$new_info{CreationDate},
-        "p|producer=s"          => \$new_info{Producer},
-        "a|author=s"            => \$new_info{Author},
-        "s|subject=s"           => \$new_info{Subject},
-        "k|keywords=s"          => \$new_info{Keywords},
-        "t|title=s"             => \$new_info{Title},
-) or die "Usage: (no help yet!)\n";
-
-
-
-for my $file (@ARGV)
-{
-        my $pdf = PDF::API2->open( $file )
-                or warn "Unable to open $file: $!\n"
-                and next;
-
-        my %info = $pdf->info;
-        for my $key (keys %info)
-        {
-                print $key.' = """'.$info{$key}.'"""'."\n";
-        }
-        print "\n";
-
-        for my $key (keys %new_info)
-        {
-                my $new_value = $new_info{$key};
-                next unless defined $new_value;
-
-                $info{$key} = $new_value;
-        }
-
-        $pdf->info( %info );
-        $pdf->saveas( $file );
-}
-
diff --git a/src/libprs500/ebooks/metadata/pdf.py b/src/libprs500/ebooks/metadata/pdf.py
index eeae0bb378..c0596e930e 100644
--- a/src/libprs500/ebooks/metadata/pdf.py
+++ b/src/libprs500/ebooks/metadata/pdf.py
@@ -56,7 +56,7 @@ def set_metadata(path, options):
     return True
 
 def get_metadata_from_file(path, default_mi=None):
-    if not default_mi:
+    if default_mi is None:
         title = os.path.splitext(os.path.basename(path))[0]
         mi = MetaInformation(title, 'Unknown')
     else: