diff --git a/app/models/issue.rb b/app/models/issue.rb
index 6706c27..842f773 100644
--- a/app/models/issue.rb
+++ b/app/models/issue.rb
@@ -403,7 +403,7 @@ class Issue < ActiveRecord::Base
   safe_attributes 'is_private',
     :if => lambda {|issue, user|
       user.allowed_to?(:set_issues_private, issue.project) ||
-        (issue.author == user && user.allowed_to?(:set_own_issues_private, issue.project))
+        (issue.author_id == user.id && user.allowed_to?(:set_own_issues_private, issue.project))
     }
 
   safe_attributes 'parent_issue_id',
@@ -673,7 +673,7 @@ class Issue < ActiveRecord::Base
   # Returns the initial status of the issue
   # Returns nil for a new issue
   def status_was
-    if status_id_was && status_id_was.to_i > 0
+    if status_id_changed? && status_id_was.to_i > 0
       @status_was ||= IssueStatus.find_by_id(status_id_was)
     end
   end
@@ -762,7 +762,7 @@ class Issue < ActiveRecord::Base
       initial_status = nil
       if new_record?
         initial_status = IssueStatus.default
-      elsif status_id_was
+      elsif status_id_changed?
         initial_status = IssueStatus.find_by_id(status_id_was)
       end
       initial_status ||= status