diff --git a/app/views/graders/list.html.haml b/app/views/graders/list.html.haml
--- a/app/views/graders/list.html.haml
+++ b/app/views/graders/list.html.haml
@@ -54,8 +54,8 @@
         - @submission.each do |sub|
           %tr.inactive
             %td= link_to sub.id, submission_path(sub.id)
-            %td= ("" unless sub.user) || link_to sub.try(:user).try(:full_name), stat_user_path(sub.user.id)
-            %td= ("" unless sub.problem) || link_to sub.try(:problem).try(:full_name), stat_problem_path(sub.problem.id)
+            %td= ("" unless sub.user) || link_to(sub.try(:user).try(:full_name), stat_user_path(sub.user.id))
+            %td= ("" unless sub.problem) || link_to(sub.try(:problem).try(:full_name), stat_problem_path(sub.problem.id))
             %td= "#{time_ago_in_words(sub.submitted_at)} ago"
             %td= sub.graded_at ? "#{time_ago_in_words(sub.graded_at)} ago" : " "
             %td= sub.grader_comment
@@ -72,8 +72,8 @@
         - @backlog_submission.each do |sub|
           %tr.inactive
             %td= link_to sub.id, submission_path(sub.id)
-            %td= ("" unless sub.user) || link_to sub.try(:user).try(:full_name), stat_user_path(sub.user.id)
-            %td= ("" unless sub.problem) || link_to sub.try(:problem).try(:full_name), stat_problem_path(sub.problem.id)
+            %td= ("" unless sub.user) || link_to( sub.try(:user).try(:full_name), stat_user_path(sub.user.id))
+            %td= ("" unless sub.problem) || link_to( sub.try(:problem).try(:full_name), stat_problem_path(sub.problem.id))
             %td= "#{time_ago_in_words(sub.submitted_at)} ago"
             %td= sub.graded_at ? "#{time_ago_in_words(sub.graded_at)} ago" : " "
             %td= sub.grader_comment
diff --git a/app/views/layouts/_header.html.haml b/app/views/layouts/_header.html.haml
--- a/app/views/layouts/_header.html.haml
+++ b/app/views/layouts/_header.html.haml
@@ -2,10 +2,15 @@
   %nav
     .container-fluid
       .navbar-header
+        %button.navbar-toggle.collapsed{ data: {toggle: 'collapse', target: '#navbar-collapse'} }
+          %span.sr-only Togggle Navigation
+          %span.icon-bar
+          %span.icon-bar
+          %span.icon-bar
         %a.navbar-brand{href: main_list_path} 
           %span.glyphicon.glyphicon-home
           MAIN
-      .collapse.navbar-collapse
+      .collapse.navbar-collapse#navbar-collapse
         %ul.nav.navbar-nav
           - if (@current_user!=nil) and (GraderConfiguration.show_tasks_to?(@current_user))
             //= add_menu("#{I18n.t 'menu.tasks'}", 'tasks', 'list')
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
@@ -6,6 +6,8 @@
 
 //%div.highlight{:style => "border: 1px solid black;"}
 //=@formatted_code.html_safe
+
+
 .containter
   .row
     .col-md-7
@@ -81,7 +83,19 @@
           %td.text-right
             %strong Compiler result
           %td
-            %pre= @submission.compiler_message
+            %button.btn.btn-info.btn-xs{type: 'button', data: {toggle: 'modal', target: '#compiler'}}
+              view
+            .modal.fade#compiler{tabindex: -1,role: 'dialog'}
+              .modal-dialog.modal-lg{role:'document'}
+                .modal-content
+                  .modal-header
+                    %button.close{type: 'button', data: {dismissed: :modal}, aria: {label: 'close'}}
+                      %span{aria: {hidden: 'true'}, data: {dismiss: 'modal'}} ×
+                    %h4 Compiler message
+                  .modal-body
+                    %pre= @submission.compiler_message
+                  .modal-footer
+                    %button.btn.btn-default{type: 'button', data: {dismiss: 'modal'}} Close
         - if session[:admin]
           %tr
             %td.text-right
diff --git a/app/views/user_admin/index.html.haml b/app/views/user_admin/index.html.haml
--- a/app/views/user_admin/index.html.haml
+++ b/app/views/user_admin/index.html.haml
@@ -84,7 +84,7 @@
     %th
   - for user in @users
     %tr
-      %td= link_to user.login, controller: :users, :action => 'profile', :id => user
+      %td= link_to user.login, stat_user_path(user)
       %td= user.full_name
       %td= user.email
       %td= user.remark