diff --git a/app/assets/stylesheets/common/diffs.scss b/app/assets/stylesheets/common/diffs.scss
new file mode 100644
index 000000000..87f956303
--- /dev/null
+++ b/app/assets/stylesheets/common/diffs.scss
@@ -0,0 +1,21 @@
+.diff-list {
+  ins, ins a {
+    color: green;
+    text-decoration: none;
+    margin-right: 0.5em;
+  }
+
+  ins.obsolete, ins.obsolete a {
+    color: darkGreen;
+  }
+
+  del, del a {
+    color: red;
+    text-decoration: line-through;
+    margin-right: 0.5em;
+  }
+
+  del.obsolete, del.obsolete a {
+    color: darkRed;
+  }
+}
diff --git a/app/assets/stylesheets/specific/post_versions.scss b/app/assets/stylesheets/specific/post_versions.scss
new file mode 100644
index 000000000..03c505847
--- /dev/null
+++ b/app/assets/stylesheets/specific/post_versions.scss
@@ -0,0 +1,9 @@
+@import "../common/000_vars.scss";
+
+div#c-post-versions {
+  div#a-index {
+    tr.hilite {
+      background: $highlight_color;
+    }
+  }
+}
diff --git a/app/assets/stylesheets/specific/posts.scss b/app/assets/stylesheets/specific/posts.scss
index ae118f21d..2faf90ebf 100644
--- a/app/assets/stylesheets/specific/posts.scss
+++ b/app/assets/stylesheets/specific/posts.scss
@@ -482,30 +482,6 @@ div#c-post-versions, div#c-artist-versions {
     a {
       word-wrap: break-word
     }
-
-    tr.hilite {
-      background: $highlight_color;
-    }
-
-    ins, ins a {
-      color: green;
-      text-decoration: none;
-      margin-right: 0.5em;
-    }
-
-    ins.obsolete, ins.obsolete a {
-      color: darkGreen;
-    }
-
-    del, del a {
-      color: red;
-      text-decoration: line-through;
-      margin-right: 0.5em;
-    }
-
-    del.obsolete, del.obsolete a {
-      color: darkRed;
-    }
   }
 }
 
diff --git a/app/helpers/artist_versions_helper.rb b/app/helpers/artist_versions_helper.rb
index 8947cd0c3..fd641d80e 100644
--- a/app/helpers/artist_versions_helper.rb
+++ b/app/helpers/artist_versions_helper.rb
@@ -1,7 +1,8 @@
 module ArtistVersionsHelper
   def artist_version_other_names_diff(artist_version)
     diff = artist_version.other_names_diff(artist_version.previous)
-    html = []
+    html = '<span class="diff-list">'
+
     diff[:added_names].each do |name|
       prefix = diff[:obsolete_added_names].include?(name) ? '<ins class="obsolete">' : '<ins>'
       html << prefix + h(name) + '</ins>'
@@ -13,12 +14,15 @@ module ArtistVersionsHelper
     diff[:unchanged_names].each do |name|
       html << '<span>' + h(name) + '</span>'
     end
-    return html.join(" ").html_safe
+
+    html << "</span>"
+    return html.html_safe
   end
 
   def artist_version_urls_diff(artist_version)
     diff = artist_version.urls_diff(artist_version.previous)
-    html = []
+    html = '<ul class="diff-list">'
+
     diff[:added_urls].each do |url|
       prefix = diff[:obsolete_added_urls].include?(url) ? '<ins class="obsolete">' : '<ins>'
       html << '<li>' + prefix + h(url) + '</ins></li>'
@@ -30,6 +34,8 @@ module ArtistVersionsHelper
     diff[:unchanged_urls].each do |url|
       html << '<li><span>' + h(url) + '</span></li>'
     end
-    return html.join(" ").html_safe
+
+    html << "</ul>"
+    html.html_safe
   end
 end
diff --git a/app/helpers/post_versions_helper.rb b/app/helpers/post_versions_helper.rb
index a344ed09c..f24545025 100644
--- a/app/helpers/post_versions_helper.rb
+++ b/app/helpers/post_versions_helper.rb
@@ -1,7 +1,8 @@
 module PostVersionsHelper
   def post_version_diff(post_version)
     diff = post_version.diff(post_version.previous)
-    html = []
+    html = '<span class="diff-list">'
+
     diff[:added_tags].each do |tag|
       prefix = diff[:obsolete_added_tags].include?(tag) ? '+<ins class="obsolete">' : '<ins>+'
       html << prefix + link_to(wordbreakify(tag), posts_path(:tags => tag)) + '</ins>'
@@ -13,6 +14,8 @@ module PostVersionsHelper
     diff[:unchanged_tags].each do |tag|
       html << '<span>' + link_to(wordbreakify(tag), posts_path(:tags => tag)) + '</span>'
     end
-    return html.join(" ").html_safe
+
+    html << "</span>"
+    html.html_safe
   end
 end
diff --git a/app/helpers/upload_tags_report_helper.rb b/app/helpers/upload_tags_report_helper.rb
index f7a997853..76ef3f3b2 100644
--- a/app/helpers/upload_tags_report_helper.rb
+++ b/app/helpers/upload_tags_report_helper.rb
@@ -1,12 +1,15 @@
 module UploadTagsReportHelper
   def diff_to_current(report)
-    html = []
+    html = '<span class="diff-list">'
+
     report.added_tags_array.each do |tag|
       html << '<ins>+' + link_to(wordbreakify(tag), posts_path(:tags => tag)) + '</ins>'
     end
     report.removed_tags_array.each do |tag|
       html << '<del>-' + link_to(wordbreakify(tag), posts_path(:tags => tag)) + '</del>'
     end
-    return html.join(" ").html_safe
+
+    html << "</span>"
+    html.html_safe
   end
 end
diff --git a/app/views/artist_versions/index.html.erb b/app/views/artist_versions/index.html.erb
index c49e8559e..9b47309c0 100644
--- a/app/views/artist_versions/index.html.erb
+++ b/app/views/artist_versions/index.html.erb
@@ -42,7 +42,7 @@
               <% end %>
               <td><%= artist_version.is_active? %></td>
               <% if artist_version.visible? %>
-                <td><ul><%= artist_version_urls_diff(artist_version) %></ul></td>
+                <td><%= artist_version_urls_diff(artist_version) %></td>
               <% else %>
                 <td></td>
               <% end %>