diff --git a/lib/jekyll/tags/post_url.rb b/lib/jekyll/tags/post_url.rb
index 0f92df49..39adc51a 100644
--- a/lib/jekyll/tags/post_url.rb
+++ b/lib/jekyll/tags/post_url.rb
@@ -3,35 +3,15 @@ module Jekyll
     class PostComparer
       MATCHER = /^(.+\/)*(\d+-\d+-\d+)-(.*)$/
 
-      attr_accessor :date, :slug
+      attr_accessor :path, :date, :slug
 
       def initialize(name)
-        all, path, date, slug = *name.sub(/^\//, "").match(MATCHER)
+        all, @path, @date, @slug = *name.sub(/^\//, "").match(MATCHER)
         raise ArgumentError.new("'#{name}' does not contain valid date and/or title.") unless all
-        @slug = path ? path + slug : slug
-        @date = Utils.parse_date(date, "'#{name}' does not contain valid date.")
       end
 
       def ==(other)
-        slug == post_slug(other) &&
-          date.year  == other.date.year &&
-          date.month == other.date.month &&
-          date.day   == other.date.day
-      end
-
-      private
-      # Construct the directory-aware post slug for a Jekyll::Post
-      #
-      # other - the Jekyll::Post
-      #
-      # Returns the post slug with the subdirectory (relative to _posts)
-      def post_slug(other)
-        path = other.name.split("/")[0...-1].join("/")
-        if path.nil? || path == ""
-          other.slug
-        else
-          path + '/' + other.slug
-        end
+        other.name.match(/^#{path}#{date}-#{slug}\.[^.]+/)
       end
     end