Tylko w .: add_closed_issue_notes.patch
diff -rubBw a/app/models/issue.rb b/app/models/issue.rb
--- a/app/models/issue.rb	2015-02-26 19:17:37.000000000 +0100
+++ b/app/models/issue.rb	2015-02-26 20:21:27.242222301 +0100
@@ -148,7 +148,11 @@
 
   # Returns true if user or current user is allowed to edit or add a note to the issue
   def editable?(user=User.current)
-    user.allowed_to?(:edit_issues, project) || user.allowed_to?(:add_issue_notes, project)
+    if self.closed?
+        return user.allowed_to?(:add_closed_issue_notes, project)
+    else
+        return user.allowed_to?(:edit_issues, project) || user.allowed_to?(:add_issue_notes, project)
+    end
   end
 
   def initialize(attributes=nil, *args)
diff -rubBw a/lib/redmine.rb b/lib/redmine.rb
--- a/lib/redmine.rb	2015-02-26 19:17:36.000000000 +0100
+++ b/lib/redmine.rb	2015-02-26 20:26:58.205225280 +0100
@@ -116,6 +116,7 @@
     map.permission :set_issues_private, {}
     map.permission :set_own_issues_private, {}, :require => :loggedin
     map.permission :add_issue_notes, {:issues => [:edit, :update, :update_form], :journals => [:new], :attachments => :upload}
+    map.permission :add_closed_issue_notes, {:issues => [:edit, :update, :update_form], :journals => [:new], :attachments => :upload}
     map.permission :edit_issue_notes, {:journals => :edit}, :require => :loggedin
     map.permission :edit_own_issue_notes, {:journals => :edit}, :require => :loggedin
     map.permission :view_private_notes, {}, :read => true, :require => :member