diff --git a/app/assets/javascripts/blacklists.js b/app/assets/javascripts/blacklists.js
index 279964b79..d35007e6e 100644
--- a/app/assets/javascripts/blacklists.js
+++ b/app/assets/javascripts/blacklists.js
@@ -98,7 +98,7 @@
     tags.push("rating:" + $post.data("rating"));
     tags.push("user:" + $post.data("user"));
 
-    return Danbooru.is_subset(tags, blacklist.require) && !Danbooru.intersect(tags, blacklist.exclude).length;
+    return (blacklist.require.length > 0 || blacklist.exclude.length > 0) && Danbooru.is_subset(tags, blacklist.require) && !Danbooru.intersect(tags, blacklist.exclude).length;
   }
 
   Danbooru.Blacklist.post_hide = function(post) {
diff --git a/app/assets/javascripts/utility.js b/app/assets/javascripts/utility.js
index c34c2ba64..f52a0edb3 100644
--- a/app/assets/javascripts/utility.js
+++ b/app/assets/javascripts/utility.js
@@ -13,7 +13,7 @@
 
   Danbooru.is_subset = function(array, subarray) {
     var all = true;
-
+    
     $.each(subarray, function(i, val) {
       if ($.inArray(val, array) === -1) {
         all = false;
diff --git a/app/views/layouts/default.html.erb b/app/views/layouts/default.html.erb
index 9fb06d710..37a764818 100644
--- a/app/views/layouts/default.html.erb
+++ b/app/views/layouts/default.html.erb
@@ -9,7 +9,7 @@
   <meta name="current-user-id" content="<%= CurrentUser.id %>">
   <meta name="user-comment-threshold" content="<%= CurrentUser.comment_threshold %>">
   <% unless CurrentUser.user.blacklisted_tags.blank? %>
-    <meta name="blacklisted-tags" content="<%= CurrentUser.user.blacklisted_tags.gsub(/\r\n|\r|\n/, ",") %>">
+    <meta name="blacklisted-tags" content="<%= CurrentUser.user.blacklisted_tags.gsub(/(?:\r|\n)+/, ",") %>">
   <% end %>
   <% if flash[:notice] =~ /error/ %>
     <meta name="errors" content="true">