diff --git a/app/assets/javascripts/app/controllers/_application_controller.js.coffee b/app/assets/javascripts/app/controllers/_application_controller.js.coffee
index 89bddf8d8..c79250a56 100644
--- a/app/assets/javascripts/app/controllers/_application_controller.js.coffee
+++ b/app/assets/javascripts/app/controllers/_application_controller.js.coffee
@@ -539,7 +539,29 @@ class App.Controller extends Spine.Controller
   
     return newInstance
 
+  interval: (action, interval, interval_id) =>
+    
+    # check global var
+    if !@intervalID
+      @intervalID = {}
+
+    action()
+
+    # auto save
+    every = (ms, cb) -> setInterval cb, ms
+
+    # clear auto save
+    clearInterval( @intervalID[interval_id] ) if @intervalID[interval_id]
+
+    # request new data
+    @intervalID[interval_id] = every interval, () =>
+      action()
+
   userPopups: (position = 'right') ->
+
+    # remove old popovers
+    $('.popover-inner').parent().remove()
+
     # show user popup    
     $('.user-data').popover(
       delay: { show: 500, hide: 1200 },
@@ -570,6 +592,10 @@ class App.Controller extends Spine.Controller
     )
 
   userTicketPopups: (data) ->
+
+    # remove old popovers
+    $('.popover-inner').parent().remove()
+
     # get data
     @tickets = {}
     ajax = new App.Ajax
diff --git a/app/assets/javascripts/app/controllers/_dashboard/activity_stream.js.coffee b/app/assets/javascripts/app/controllers/_dashboard/activity_stream.js.coffee
index eb69b87f0..e20c49624 100644
--- a/app/assets/javascripts/app/controllers/_dashboard/activity_stream.js.coffee
+++ b/app/assets/javascripts/app/controllers/_dashboard/activity_stream.js.coffee
@@ -6,46 +6,58 @@ class App.DashboardActivityStream extends App.Controller
 
   constructor: ->
     super
-#    @log 'aaaa', @el
-    
     @items = []
     
+    # refresh list ever 140 sec.
+    @interval( @fetch, 140000, 'dashboard_activity_stream' )
+    
+  fetch: =>
+    
+    # use cache of first page
+    if window.LastRefresh[ 'dashboard_activity_stream' ]
+      @render( window.LastRefresh[ 'dashboard_activity_stream' ] )
+    
     # get data
+    if @req
+      @req.abort()
     @ajax = new App.Ajax
-    @ajax.ajax(
+    @req = @ajax.ajax(
       type:  'GET',
       url:   '/activity_stream',
       data:  {
         limit: @limit,
       }
       processData: true,
-#      data: JSON.stringify( view: @view ),
-      success: (data, status, xhr) =>
-        @items = data.activity_stream
-
-        # load user collection
-        @loadCollection( type: 'User', data: data.users )
-
-        # load ticket collection
-        @loadCollection( type: 'Ticket', data: data.tickets )
-
-        @render()
+      success: @load
     )
-
     
-  render: ->
+  load: (data) =>
+    items = data.activity_stream
+
+    # load user collection
+    @loadCollection( type: 'User', data: data.users )
+
+    # load ticket collection
+    @loadCollection( type: 'Ticket', data: data.tickets )
+
+    # set cache
+    window.LastRefresh[ 'dashboard_activity_stream' ] = items
+
+    @render(items)
+
+  render: (items) ->
 
     # load user data
-    for item in @items
+    for item in items
       item.created_by = App.User.find(item.created_by_id)
   
     # load ticket data
-    for item in @items
+    for item in items
       item.ticket = App.Ticket.find(item.o_id)
   
     html = App.view('dashboard/activity_stream')(
       head: 'Activity Stream',
-      items: @items
+      items: items
     )
     html = $(html)
     
diff --git a/app/assets/javascripts/app/controllers/_dashboard/recent_viewed.js.coffee b/app/assets/javascripts/app/controllers/_dashboard/recent_viewed.js.coffee
index cb12c9ab9..9a4c91b14 100644
--- a/app/assets/javascripts/app/controllers/_dashboard/recent_viewed.js.coffee
+++ b/app/assets/javascripts/app/controllers/_dashboard/recent_viewed.js.coffee
@@ -11,8 +11,10 @@ class App.DashboardRecentViewed extends App.Controller
     @items = []
     
     # get data
+    if @req
+      @req.abort()
     @ajax = new App.Ajax
-    @ajax.ajax(
+    @req = @ajax.ajax(
       type:  'GET',
       url:   '/recent_viewed',
       data:  {
diff --git a/app/assets/javascripts/app/controllers/_dashboard/rss.js.coffee b/app/assets/javascripts/app/controllers/_dashboard/rss.js.coffee
index 1636651cf..f35af5d63 100644
--- a/app/assets/javascripts/app/controllers/_dashboard/rss.js.coffee
+++ b/app/assets/javascripts/app/controllers/_dashboard/rss.js.coffee
@@ -3,13 +3,22 @@ $ = jQuery.sub()
 class App.DashboardRss extends App.Controller
   constructor: ->
     super
-#    @log 'aaaa', @el
     
-    @items = []
     
+    # refresh list ever 600 sec.
+    @interval( @fetch, 6000000, 'dashboard_rss' )
+
+  fetch: =>
+
+    # use cache of first page
+    if window.LastRefresh[ 'dashboard_rss' ]
+      @render( window.LastRefresh[ 'dashboard_rss' ] )
+
     # get data
+    if @req
+      @req.abort()
     @ajax = new App.Ajax
-    @ajax.ajax(
+    @req = @ajax.ajax(
       type:  'GET',
       url:   '/rss_fetch',
       data:  {
@@ -17,15 +26,21 @@ class App.DashboardRss extends App.Controller
         url:   @url,
       }
       processData: true,
-      success: (data, status, xhr) =>
-        @items = data.items || []
-        @render()
+      success: @load
     )
 
-  render: ->
+  load: (data) =>
+    items = data.items || []
+    
+    # set cache
+    window.LastRefresh[ 'dashboard_rss' ] = items
+    
+    @render(items)
+
+  render: (items) ->
     html = App.view('dashboard/rss')(
       head:  @head,
-      items: @items
+      items: items
     )
     html = $(html)
     @html html
diff --git a/app/assets/javascripts/app/controllers/_dashboard/ticket.js.coffee b/app/assets/javascripts/app/controllers/_dashboard/ticket.js.coffee
index 62e1ceded..12c7ae6a3 100644
--- a/app/assets/javascripts/app/controllers/_dashboard/ticket.js.coffee
+++ b/app/assets/javascripts/app/controllers/_dashboard/ticket.js.coffee
@@ -13,13 +13,23 @@ class App.DashboardTicket extends App.Controller
     @start_page    = 1
     @navupdate '#'
 
-    @fetch()
+    # refresh list ever 60 sec.
+    @interval( @fetch, 60000, 'dashboard_ticket_overview_' + @view )
 
-  fetch: ->
+  fetch: =>
+
+    # set new key
+    @key = @view
+
+    # use cache of first page
+    if window.LastRefresh[ @key ] && @start_page is 1
+      @render( window.LastRefresh[ @key ] )
 
     # get data
+    if @req
+      @req.abort()
     @ajax = new App.Ajax
-    @ajax.ajax(
+    @req = @ajax.ajax(
       type:  'GET',
       url:   '/ticket_overviews',
       data:  {
@@ -28,36 +38,40 @@ class App.DashboardTicket extends App.Controller
         start_page: @start_page,
       }
       processData: true,
-#      data: JSON.stringify( view: @view ),
-      success: (data, status, xhr) =>
-
-        # get meta data
-        @overview = data.overview
-        App.Overview.refresh( @overview, options: { clear: true } )
-
-        App.Overview.unbind('local:rerender')
-        App.Overview.bind 'local:rerender', (record) =>
-          @log 'rerender...', record
-          @render()
-
-        App.Overview.unbind('local:refetch')
-        App.Overview.bind 'local:refetch', (record) =>
-          @log 'refetch...', record
-          @fetch()
-
-        # load user collection
-        @loadCollection( type: 'User', data: data.users )
-
-        # load ticket collection
-        @loadCollection( type: 'Ticket', data: data.tickets )
-
-        @tickets       = data.tickets
-        @tickets_count = data.tickets_count
-
-        @render()
+      success: @load
     )
 
-  render: ->
+  load: (data) =>
+
+    # get meta data
+    App.Overview.refresh( data.overview, options: { clear: true } )
+
+    App.Overview.unbind('local:rerender')
+    App.Overview.bind 'local:rerender', (record) =>
+      @log 'rerender...', record
+      @render(data)
+
+    App.Overview.unbind('local:refetch')
+    App.Overview.bind 'local:refetch', (record) =>
+      @log 'refetch...', record
+      @fetch()
+
+    # load user collection
+    @loadCollection( type: 'User', data: data.users )
+
+    # load ticket collection
+    @loadCollection( type: 'Ticket', data: data.tickets )
+
+    # set cache
+    window.LastRefresh[ @key ] = data
+
+    @render( data )
+
+  render: (data) ->
+    
+    @overview      = data.overview
+    @tickets_count = data.tickets_count
+    @tickets       = data.tickets
     
     pages_total =  parseInt( ( @tickets_count / @overview.view.d.per_page ) + 0.99999 ) || 1
     html = App.view('dashboard/ticket')(
@@ -80,7 +94,7 @@ class App.DashboardTicket extends App.Controller
 
     if _.isEmpty(@tickets)
       table = ''
-#      table = '-none-'
+      table = '-none-'
 
     # append content table
     html.find('.table-overview').append(table)
diff --git a/app/assets/javascripts/app/controllers/agent_ticket_create.js.coffee b/app/assets/javascripts/app/controllers/agent_ticket_create.js.coffee
index 54ce2b6a9..6114a6119 100644
--- a/app/assets/javascripts/app/controllers/agent_ticket_create.js.coffee
+++ b/app/assets/javascripts/app/controllers/agent_ticket_create.js.coffee
@@ -29,7 +29,9 @@ class Index extends App.Controller
   fetch: () ->
     # get data
     @ajax = new App.Ajax
-    @ajax.ajax(
+    if @req
+      @req.abort()
+    @req = @ajax.ajax(
       type:  'GET',
       url:   '/ticket_create',
       data:  {
diff --git a/app/assets/javascripts/app/controllers/agent_ticket_view.js.coffee b/app/assets/javascripts/app/controllers/agent_ticket_view.js.coffee
index a343dcbfd..9fae3aab6 100644
--- a/app/assets/javascripts/app/controllers/agent_ticket_view.js.coffee
+++ b/app/assets/javascripts/app/controllers/agent_ticket_view.js.coffee
@@ -31,10 +31,11 @@ class Index extends App.Controller
 
   fetch: ->
 
-
     # get data
+    if @req
+      @req.abort()
     @ajax = new App.Ajax
-    @ajax.ajax(
+    @req = @ajax.ajax(
       type:  'GET',
       url:   '/ticket_overviews',
       data:  {
diff --git a/app/assets/javascripts/app/controllers/navigation.js.coffee b/app/assets/javascripts/app/controllers/navigation.js.coffee
index cd0b39bd8..7b8e07ef0 100644
--- a/app/assets/javascripts/app/controllers/navigation.js.coffee
+++ b/app/assets/javascripts/app/controllers/navigation.js.coffee
@@ -10,10 +10,10 @@ class App.Navigation extends App.Controller
     @render()
     
     sync_ticket_overview = =>
-      @sync(@ticket_overview, 30000,'interval_id_ticket_overview')
+      @interval( @ticket_overview, 30000, 'nav_ticket_overview' )
 
     sync_recent_viewed = =>
-      @sync(@recent_viewed, 40000, 'interval_id_recent_viewed')
+      @interval( @recent_viewed, 40000, 'nav_recent_viewed' )
     
     Spine.bind 'navupdate', (data) =>
       @update(arguments[0])
@@ -29,8 +29,6 @@ class App.Navigation extends App.Controller
     
     # rerender if new overview data is there
     @delay( sync_ticket_overview, 800 )
-    @delay( sync_ticket_overview, 2000 )
-    
     @delay( sync_recent_viewed, 1000 )
     
   render: (user) ->
@@ -128,24 +126,6 @@ class App.Navigation extends App.Controller
     @el.find("[href=\"#{url}\"]").parents('li').addClass('active')
 #      @el.find("[href*=\"#{url}\"]").parents('li').addClass('active')
 
-  sync: (action, interval, interval_id) =>
-    
-    # check global var
-    if !@intervalID
-      @intervalID = {}
-
-    action()
-
-    # auto save
-    every = (ms, cb) -> setInterval cb, ms
-
-    # clear auto save
-    clearInterval(@intervalID[interval_id]) if @intervalID[interval_id]
-
-    # request new data
-    @intervalID[interval_id] = every interval, () =>
-      action()
-
   # get data
   ticket_overview: =>
 
@@ -158,34 +138,40 @@ class App.Navigation extends App.Controller
     if !window.Session['id']
       return
 
-    @ajax = new App.Ajax
-    @ajax.ajax(
-      type:  'GET',
-      url:   '/ticket_overviews',
-      data:  {},
-      processData: true,
-      success: (data, status, xhr) =>
+    # only of lod request is already done
 
-        # remove old views
-        for key of Config.NavBar
-          if Config.NavBar[key].parent is '#ticket/view'
-            delete Config.NavBar[key]
-
-        # add new views
-        for item in data
-          Config.NavBar['TicketOverview' + item.url] = {
-            prio:   item.prio,
-            parent: '#ticket/view',
-            name:   item.name,
-            count:  item.count,
-            target: '#ticket/view/' + item.url,
-            role:   ['Agent'],
-          }
-
-        # rebuild navbar
-        Spine.trigger 'navrebuild', window.Session
-    )
+    if !@req_overview
+      @ajax = new App.Ajax
+#      @req_overview.abort()
+      @req_overview = @ajax.ajax(
+        type:  'GET',
+        url:   '/ticket_overviews',
+        data:  {},
+        processData: true,
+        success: (data, status, xhr) =>
+  
+          # remove old views
+          for key of Config.NavBar
+            if Config.NavBar[key].parent is '#ticket/view'
+              delete Config.NavBar[key]
+  
+          # add new views
+          for item in data
+            Config.NavBar['TicketOverview' + item.url] = {
+              prio:   item.prio,
+              parent: '#ticket/view',
+              name:   item.name,
+              count:  item.count,
+              target: '#ticket/view/' + item.url,
+              role:   ['Agent'],
+            }
+  
+          # rebuild navbar
+          Spine.trigger 'navrebuild', window.Session
 
+          # reset ajax call
+          @req_overview = undefined
+      )
 
   # get data
   recent_viewed: =>
@@ -199,51 +185,56 @@ class App.Navigation extends App.Controller
     if !window.Session['id']
       return
 
-    @ajax = new App.Ajax
-    @ajax.ajax(
-      type:  'GET',
-      url:   '/recent_viewed',
-      data:  {
-        limit: 5,
-      }
-      processData: true,
-      success: (data, status, xhr) =>
+    # only of lod request is already done
+    if !@req_recent_viewed
+      @ajax = new App.Ajax
+      @req_recent_viewed = @ajax.ajax(
+        type:  'GET',
+        url:   '/recent_viewed',
+        data:  {
+          limit: 5,
+        }
+        processData: true,
+        success: (data, status, xhr) =>
+  
+          items = data.recent_viewed
+  
+          # load user collection
+          @loadCollection( type: 'User', data: data.users )
+  
+          # load ticket collection
+          @loadCollection( type: 'Ticket', data: data.tickets )
+  
+          # remove old views
+          for key of Config.NavBarRight
+            if Config.NavBarRight[key].parent is '#current_user'
+              part = Config.NavBarRight[key].target.split '::'
+              if part is 'RecendViewed'
+                delete Config.NavBarRight[key]
+  
+          # add new views
+          prio = 5000
+          for item in items
+            divider   = false
+            navheader = false
+            if prio is 5000
+              divider   = true
+              navheader = 'Recent Viewed'
+            ticket = App.Ticket.find(item.o_id)
+            prio++
+            Config.NavBarRight['RecendViewed::' + ticket.id] = {
+              prio:      prio,
+              parent:    '#current_user',
+              name:      item.history_object.name + ' (' + ticket.title + ')',
+              target:    '#ticket/zoom/' + ticket.id,
+              role:      ['Agent'],
+              divider:   divider,
+              navheader: navheader
+            }
+  
+          # rebuild navbar
+          Spine.trigger 'navrebuild', window.Session
 
-        items = data.recent_viewed
-
-        # load user collection
-        @loadCollection( type: 'User', data: data.users )
-
-        # load ticket collection
-        @loadCollection( type: 'Ticket', data: data.tickets )
-
-        # remove old views
-        for key of Config.NavBarRight
-          if Config.NavBarRight[key].parent is '#current_user'
-            part = Config.NavBarRight[key].target.split '::'
-            if part is 'RecendViewed'
-              delete Config.NavBarRight[key]
-
-        # add new views
-        prio = 5000
-        for item in items
-          divider   = false
-          navheader = false
-          if prio is 5000
-            divider   = true
-            navheader = 'Recent Viewed'
-          ticket = App.Ticket.find(item.o_id)
-          prio++
-          Config.NavBarRight['RecendViewed::' + ticket.id] = {
-            prio:      prio,
-            parent:    '#current_user',
-            name:      item.history_object.name + ' (' + ticket.title + ')',
-            target:    '#ticket/zoom/' + ticket.id,
-            role:      ['Agent'],
-            divider:   divider,
-            navheader: navheader
-          }
-
-        # rebuild navbar
-        Spine.trigger 'navrebuild', window.Session
-    )
+          # reset ajax call
+          @req_recent_viewed = undefined
+      )
diff --git a/app/assets/javascripts/init.js b/app/assets/javascripts/init.js
index 58775ca20..5c7f95d3d 100644
--- a/app/assets/javascripts/init.js
+++ b/app/assets/javascripts/init.js
@@ -6,3 +6,4 @@ Config.product_name = 'Zammad'
 Config.requested_url = ''
 var Store = {};
 var Session = {};
+var LastRefresh = {};