diff --git a/src/cutecoin/gui/community_view.py b/src/cutecoin/gui/community_view.py
index ffba895d12ffe2b3618194a10e38501e8cacbc61..b76ed0161cdf9b1b24b5cbde6c9c5ba326b3ea5a 100644
--- a/src/cutecoin/gui/community_view.py
+++ b/src/cutecoin/gui/community_view.py
@@ -63,11 +63,11 @@ class CommunityWidget(QWidget, Ui_CommunityWidget):
                                  QIcon(':/icons/tx_icon'),
                                 self.tr("Transactions"))
 
-        self.tabs.addTab(self.tab_identities,
+        self.tabs.addTab(self.tab_wot,
                          QIcon(':/icons/wot_icon'),
                          self.tr("Web of Trust"))
 
-        self.tabs.addTab(self.tab_wot,
+        self.tabs.addTab(self.tab_identities,
                          QIcon(':/icons/members_icon'),
                          self.tr("Search Identities"))
 
@@ -81,15 +81,21 @@ class CommunityWidget(QWidget, Ui_CommunityWidget):
         self.tab_identities.change_account(account)
 
     def change_community(self, community):
-        self.community = community
         self.tab_network.change_community(community)
         self.tab_wot.change_community(community)
         self.tab_history.change_community(community)
         self.tab_identities.change_community(community)
 
-        self.community.network.new_block_mined.connect(self.refresh_block)
-        self.community.network.nodes_changed.connect(self.refresh_status)
-        self.community.inner_data_changed.connect(self.refresh_status)
+        if self.community:
+            self.community.network.new_block_mined.disconnect(self.refresh_block)
+            self.community.network.nodes_changed.disconnect(self.refresh_status)
+            self.community.inner_data_changed.disconnect(self.refresh_status)
+        if community:
+            community.network.new_block_mined.connect(self.refresh_block)
+            community.network.nodes_changed.connect(self.refresh_status)
+            community.inner_data_changed.connect(self.refresh_status)
+            self.label_currency.setText(community.currency)
+        self.community = community
 
     @pyqtSlot(str)
     def display_error(self, error):
@@ -188,7 +194,7 @@ class CommunityWidget(QWidget, Ui_CommunityWidget):
         self.refresh_status()
 
     def referential_changed(self):
-        if self.tab_history.table_history.model():
+        if self.community and self.tab_history.table_history.model():
             self.tab_history.table_history.model().dataChanged.emit(
                                                      QModelIndex(),
                                                      QModelIndex(),
diff --git a/src/cutecoin/gui/mainwindow.py b/src/cutecoin/gui/mainwindow.py
index d15d5147ddcba63ad982cba8c3e1941283523d79..b7fec5a56ccce28460ea8469486ab93d0f0c1ce9 100644
--- a/src/cutecoin/gui/mainwindow.py
+++ b/src/cutecoin/gui/mainwindow.py
@@ -71,8 +71,10 @@ class MainWindow(QMainWindow, Ui_MainWindow):
         self.homescreen.toolbutton_new_account.addAction(self.action_import)
         self.homescreen.button_disconnect.clicked.connect(lambda :self.action_change_account(""))
         self.centralWidget().layout().addWidget(self.homescreen)
+        self.homescreen.toolbutton_connect.setMenu(self.menu_change_account)
 
         self.community_view = CommunityWidget(self.app, self.status_label)
+        self.community_view.button_home.clicked.connect(lambda: self.change_community(None))
         self.community_view.button_certification.clicked.connect(self.open_certification_dialog)
         self.community_view.button_send_money.clicked.connect(self.open_transfer_money_dialog)
         self.centralWidget().layout().addWidget(self.community_view)
@@ -236,9 +238,16 @@ class MainWindow(QMainWindow, Ui_MainWindow):
 
     @pyqtSlot(Community)
     def change_community(self, community):
-        logging.debug("Change on tile")
-        self.homescreen.hide()
-        self.community_view.show()
+        if self.community_view.community:
+            self.community_view.community.stop_coroutines()
+
+        if community:
+            self.homescreen.hide()
+            self.community_view.show()
+        else:
+            self.homescreen.show()
+            self.community_view.hide()
+
         self.community_view.change_community(community)
 
     def refresh_accounts(self):
@@ -247,7 +256,6 @@ class MainWindow(QMainWindow, Ui_MainWindow):
             action = QAction(account_name, self)
             action.triggered.connect(lambda checked, account_name=account_name: self.action_change_account(account_name))
             self.menu_change_account.addAction(action)
-            self.homescreen.toolbutton_connect.addAction(action)
 
     def refresh_contacts(self):
         self.menu_contacts_list.clear()
@@ -275,9 +283,12 @@ class MainWindow(QMainWindow, Ui_MainWindow):
 
         if self.app.current_account is None:
             self.setWindowTitle(self.tr("CuteCoin {0}").format(__version__))
-            self.menu_account.setEnabled(False)
+            self.action_add_a_contact.setEnabled(False)
+            self.actionCertification.setEnabled(False)
+            self.actionTransfer_money.setEnabled(False)
             self.action_configure_parameters.setEnabled(False)
             self.action_set_as_default.setEnabled(False)
+            self.menu_contacts_list.setEnabled(False)
             self.combo_referential.setEnabled(False)
             self.status_label.setText(self.tr(""))
             self.password_asker = None
@@ -293,7 +304,10 @@ class MainWindow(QMainWindow, Ui_MainWindow):
             self.combo_referential.blockSignals(False)
             logging.debug(self.app.preferences)
             self.combo_referential.setCurrentIndex(self.app.preferences['ref'])
-            self.menu_account.setEnabled(True)
+            self.action_add_a_contact.setEnabled(True)
+            self.actionCertification.setEnabled(True)
+            self.actionTransfer_money.setEnabled(True)
+            self.menu_contacts_list.setEnabled(True)
             self.action_configure_parameters.setEnabled(True)
             self.setWindowTitle(self.tr("CuteCoin {0} - Account : {1}").format(__version__,
                                                                                self.app.current_account.name))
diff --git a/src/cutecoin/gui/network_tab.py b/src/cutecoin/gui/network_tab.py
index 8021fa81a7c33d738d715fd575d772f820a25df0..0c0e73c657765c123246e13c95263231d0cab2f9 100644
--- a/src/cutecoin/gui/network_tab.py
+++ b/src/cutecoin/gui/network_tab.py
@@ -41,9 +41,13 @@ class NetworkTabWidget(QWidget, Ui_NetworkTabWidget):
         self.table_network.resizeColumnsToContents()
 
     def change_community(self, community):
+        if community:
+            community.network.nodes_changed.connect(self.refresh_nodes)
+        if self.community:
+            self.community.network.nodes_changed.disconnect(self.refresh_nodes)
+
         self.community = community
         self.table_network.model().change_community(community)
-        community.network.nodes_changed.connect(self.refresh_nodes)
 
     @pyqtSlot()
     def refresh_nodes(self):
diff --git a/src/cutecoin/gui/transactions_tab.py b/src/cutecoin/gui/transactions_tab.py
index d277810023e316f810b2b6f7edc84c143f5d9c79..5ef5cf9acadeb754d3d33623bfd9f9f6241eaaef 100644
--- a/src/cutecoin/gui/transactions_tab.py
+++ b/src/cutecoin/gui/transactions_tab.py
@@ -35,9 +35,12 @@ class TransactionsTabWidget(QWidget, Ui_transactionsTabWidget):
         self.refresh()
 
     def change_community(self, community):
+        if self.community:
+            self.community.inner_data_changed.disconnect(self.refresh_minimum_maximum)
+        if community:
+            community.inner_data_changed.connect(self.refresh_minimum_maximum)
         self.community = community
         self.refresh()
-        self.community.inner_data_changed.connect(self.refresh_minimum_maximum)
 
     def refresh_minimum_maximum(self):
         block = self.community.get_block(1)
diff --git a/src/cutecoin/gui/wot_tab.py b/src/cutecoin/gui/wot_tab.py
index c2d436721a00f2f7157d745da98593989bc5e711..16b7f83495484747ab40480a3de6c9d9f3c5119f 100644
--- a/src/cutecoin/gui/wot_tab.py
+++ b/src/cutecoin/gui/wot_tab.py
@@ -52,9 +52,12 @@ class WotTabWidget(QWidget, Ui_WotTabWidget):
         self.account = account
 
     def change_community(self, community):
+        if self.community:
+            self.community.network.new_block_mined.disconnect(self.refresh)
+        if community:
+            community.network.new_block_mined.connect(self.refresh)
         self.community = community
         self.reset()
-        self.community.network.new_block_mined.connect(self.refresh)
 
     def refresh_informations_frame(self):
         parameters = self.community.parameters