fixes #1620

app/models/post.rb

@@ -870,8 +870,6 @@ class Post < ActiveRecord::Base
 
   module VersionMethods
     def create_version
-      return if disable_versioning
-
       if new_record? || rating_changed? || source_changed? || parent_id_changed? || tag_string_changed?
         CurrentUser.increment!(:post_update_count)
         versions.create(

app/models/tag_alias.rb

@@ -130,7 +130,6 @@ class TagAlias < ActiveRecord::Base
       escaped_antecedent_name = Regexp.escape(antecedent_name)
       fixed_tags = post.tag_string.sub(/(?:\A| )#{escaped_antecedent_name}(?:\Z| )/, " #{consequent_name} ").strip
       CurrentUser.scoped(creator, creator_ip_addr) do
-        post.disable_versioning = true
         post.update_attributes(
           :tag_string => fixed_tags
         )

app/models/tag_implication.rb

@@ -109,7 +109,6 @@ class TagImplication < ActiveRecord::Base
           escaped_tag_name = Regexp.escape(tag_name)
           fixed_tags = post.tag_string.sub(/(?:\A| )#{escaped_tag_name}(?:\Z| )/, " ").strip
           CurrentUser.scoped(User.find(creator_id), creator_ip_addr) do
-            post.disable_versioning = true
             post.update_attributes(
               :tag_string => fixed_tags
             )
@@ -155,7 +154,6 @@ class TagImplication < ActiveRecord::Base
       escaped_antecedent_name = Regexp.escape(antecedent_name)
       fixed_tags = post.tag_string.sub(/(?:\A| )#{escaped_antecedent_name}(?:\Z| )/, " #{antecedent_name} #{descendant_names} ").strip
       CurrentUser.scoped(creator, creator_ip_addr) do
-        post.disable_versioning = true
         post.update_attributes(
           :tag_string => fixed_tags
         )