diff --git a/app/models/user.rb b/app/models/user.rb
index 9c437a186..b9d9de029 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -226,7 +226,7 @@ class User < Principal
   validates_uniqueness_of :login, :if => Proc.new { |user| user.login_changed? && user.login.present? }, :case_sensitive => false
   validates_uniqueness_of :mail, :if => Proc.new { |user| user.mail_changed? && user.mail.present? }, :case_sensitive => false
   # Login must contain letters, numbers, underscores only
-  validates_format_of :login, :with => /\A[a-z0-9_\-@\.]*\z/i
+  validates_format_of :login, :with => /\A[a-z0-9_\-\.]*\z/i
   validates_length_of :login, :maximum => LOGIN_LENGTH_LIMIT
   validates_length_of :firstname, :maximum => 30
   validates_length_of :lastname, :maximum => 30
diff --git a/lib/tasks/sync_check_members.rake b/lib/tasks/sync_check_members.rake
new file mode 100644
index 000000000..8c942c88c
--- /dev/null
+++ b/lib/tasks/sync_check_members.rake
@@ -0,0 +1,25 @@
+require 'trustie/gitlab/sync'
+
+namespace :gitlab do
+  namespace :check_members do
+    desc "check up projects' members "
+    task :projects => :environment do
+      s = Trustie::Gitlab::Sync.new
+      g = Gitlab.client
+      Project.all.each do |project|
+        unless project.gpid.nil?
+          begin
+            gmembers = g.team_members(project.gpid)
+            if gmembers.count != project.members.count
+              puts "gitlab' projects count #{gmembers.count}"
+              puts "project ID is #{project.id}"
+              s.only_members(project)
+            end
+          rescue
+            p "This project is wrong #{project.id}"
+          end
+        end
+      end
+    end
+  end
+end