diff --git a/app/controllers/user_admin_controller.rb b/app/controllers/user_admin_controller.rb
--- a/app/controllers/user_admin_controller.rb
+++ b/app/controllers/user_admin_controller.rb
@@ -65,7 +65,8 @@
     ok_user = []
 
     lines.split("\n").each do |line|
-      items = line.chomp.split(',')
+      #split with large limit, this will cause consecutive ',' to be result in a blank
+      items = line.chomp.split(',',1000)
       if items.length>=2
         login = items[0]
         full_name = items[1]
@@ -73,8 +74,12 @@
         user_alias = ''
 
         added_random_password = false
-        if items.length >= 3 and items[2].chomp(" ").length > 0;
-          password = items[2].chomp(" ")
+        added_password = false
+        if items.length >= 3
+          if items[2].chomp(" ").length > 0
+            password = items[2].chomp(" ")
+            added_password = true
+          end
         else
           password = random_password
           added_random_password=true;
@@ -86,16 +91,21 @@
           user_alias = login
         end
 
+
+        has_remark = false
         if items.length>=5
           remark = items[4].strip;
+          has_remark = true
         end
 
         user = User.find_by_login(login)
         if (user)
           user.full_name = full_name
-          user.password = password
-          user.remark = remark
+          user.remark = remark if has_remark
+          user.password = password if added_password || added_random_password
         else
+          #create a random password if none are given
+          password = random_password unless password
           user = User.new({:login => login,
                            :full_name => full_name,
                            :password => password,
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -182,9 +182,6 @@
 #{header}
 <tr>
 <td class="left-col">
-#{user.full_name}<br/>
-#{t 'title_bar.current_time'} #{format_short_time(Time.zone.now)}
-#{time_left}
 <br/>
 </td>
 <td class="right-col">#{contest_name}</td>
diff --git a/app/helpers/main_helper.rb b/app/helpers/main_helper.rb
--- a/app/helpers/main_helper.rb
+++ b/app/helpers/main_helper.rb
@@ -1,17 +1,11 @@
 module MainHelper
 
-  def link_to_description_if_any(name, problem, options={})
+  def link_to_description_if_any(name, problem)
     if !problem.url.blank?
-      return link_to name, problem.url, options
+      return link_to name, problem.url
     elsif !problem.description_filename.blank?
-      #build a link to a problem (via task controller)
       basename, ext = problem.description_filename.split('.')
-      options[:controller] = 'tasks'
-      options[:action] = 'download'
-      options[:id] = problem.id
-      options[:file] = basename
-      options[:ext] = ext
-      return link_to name, options
+      return link_to name, download_task_path(problem.id,basename,ext), target: '_blank'
     else
       return ''
     end
diff --git a/app/views/submissions/show.html.haml b/app/views/submissions/show.html.haml
--- a/app/views/submissions/show.html.haml
+++ b/app/views/submissions/show.html.haml
@@ -42,6 +42,7 @@
             - if @submission.problem!=nil
               = link_to "[#{@submission.problem.name}]", stat_problem_path(@submission.problem)
               = @submission.problem.full_name
+              = link_to_description_if_any "[download] <span class='glyphicon glyphicon-file'></span>".html_safe, @submission.problem
             - else
               = "(n/a)"
         %tr
diff --git a/app/views/user_admin/new_list.html.haml b/app/views/user_admin/new_list.html.haml
--- a/app/views/user_admin/new_list.html.haml
+++ b/app/views/user_admin/new_list.html.haml
@@ -26,6 +26,15 @@
               is empty, the original value will be used instead.
             %li
               If the users with the same user_id already exists, existing information will be overwritten.
+          Example:
+          %ol
+            %li 
+              %pre user1,Somchai Jaidee
+              will create (or update) a user with login "user1" and setting the fullname to "Somchai Jaidee", also setting a random password.
+            %li 
+              %pre user1,Somchai Jaidee,
+              will create (or update) a user with login "user1" and and setting the fullname "Somchai Jaidee". No change is made to the password unless this is a new user. If this is a new user, a random password will be generated.
+
 
   .row
     .col-md-6
diff --git a/config/routes.rb b/config/routes.rb
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -177,7 +177,7 @@
 
   #
   get 'tasks/view/:file.:ext' => 'tasks#view'
-  get 'tasks/download/:id/:file.:ext' => 'tasks#download'
+  get 'tasks/download/:id/:file.:ext' => 'tasks#download', as: 'download_task'
   get 'heartbeat/:id/edit' => 'heartbeat#edit'
 
   #grader