diff --git a/src/qt/bitcoin.cpp b/src/qt/bitcoin.cpp
index 12277a8ad..6cc6b99ce 100644
--- a/src/qt/bitcoin.cpp
+++ b/src/qt/bitcoin.cpp
@@ -415,8 +415,8 @@ void BitcoinApplication::initializeResult(int retval)
         {
             walletModel = new WalletModel(pwalletMain, optionsModel);
 
-            window->addWallet("~Default", walletModel);
-            window->setCurrentWallet("~Default");
+            window->addWallet(BitcoinGUI::DEFAULT_WALLET, walletModel);
+            window->setCurrentWallet(BitcoinGUI::DEFAULT_WALLET);
 
             connect(walletModel, SIGNAL(coinsSent(CWallet*,SendCoinsRecipient,QByteArray)),
                              paymentServer, SLOT(fetchPaymentACK(CWallet*,const SendCoinsRecipient&,QByteArray)));
diff --git a/src/qt/bitcoingui.cpp b/src/qt/bitcoingui.cpp
index d0a5ff13c..68d42ce64 100644
--- a/src/qt/bitcoingui.cpp
+++ b/src/qt/bitcoingui.cpp
@@ -62,10 +62,35 @@ BitcoinGUI::BitcoinGUI(bool fIsTestnet, QWidget *parent) :
     QMainWindow(parent),
     clientModel(0),
     walletFrame(0),
+    unitDisplayControl(0),
+    labelEncryptionIcon(0),
+    labelConnectionsIcon(0),
+    labelBlocksIcon(0),
+    progressBarLabel(0),
+    progressBar(0),
+    progressDialog(0),
+    appMenuBar(0),
+    overviewAction(0),
+    historyAction(0),
+    quitAction(0),
+    sendCoinsAction(0),
+    usedSendingAddressesAction(0),
+    usedReceivingAddressesAction(0),
+    signMessageAction(0),
+    verifyMessageAction(0),
+    aboutAction(0),
+    receiveCoinsAction(0),
+    optionsAction(0),
+    toggleHideAction(0),
     encryptWalletAction(0),
+    backupWalletAction(0),
     changePassphraseAction(0),
     aboutQtAction(0),
+    openRPCConsoleAction(0),
+    openAction(0),
+    showHelpMessageAction(0),
     trayIcon(0),
+    trayIconMenu(0),
     notificator(0),
     rpcConsole(0),
     prevBlocks(0),
@@ -426,8 +451,12 @@ void BitcoinGUI::setClientModel(ClientModel *clientModel)
             walletFrame->setClientModel(clientModel);
         }
 #endif
-
-        this->unitDisplayControl->setOptionsModel(clientModel->getOptionsModel());
+        unitDisplayControl->setOptionsModel(clientModel->getOptionsModel());
+    } else {
+        // Disable possibility to show main window via action
+        toggleHideAction->setEnabled(false);
+        // Disable context menu on tray icon
+        trayIconMenu->clear();
     }
 }
 
@@ -496,7 +525,6 @@ void BitcoinGUI::createTrayIcon(bool fIsTestnet)
 
 void BitcoinGUI::createTrayIconMenu()
 {
-    QMenu *trayIconMenu;
 #ifndef Q_OS_MAC
     // return if trayIcon is unset (only on non-Mac OSes)
     if (!trayIcon)
@@ -537,7 +565,7 @@ void BitcoinGUI::trayIconActivated(QSystemTrayIcon::ActivationReason reason)
     if(reason == QSystemTrayIcon::Trigger)
     {
         // Click on system tray icon triggers show/hide of the main window
-        toggleHideAction->trigger();
+        toggleHidden();
     }
 }
 #endif
@@ -923,6 +951,7 @@ void BitcoinGUI::showNormalIfMinimized(bool fToggleHidden)
 {
     if(!clientModel)
         return;
+
     // activateWindow() (sometimes) helps with keyboard focus on Windows
     if (isHidden())
     {
@@ -1007,9 +1036,10 @@ void BitcoinGUI::unsubscribeFromCoreSignals()
     uiInterface.ThreadSafeMessageBox.disconnect(boost::bind(ThreadSafeMessageBox, this, _1, _2, _3));
 }
 
-UnitDisplayStatusBarControl::UnitDisplayStatusBarControl():QLabel()
+UnitDisplayStatusBarControl::UnitDisplayStatusBarControl() :
+    optionsModel(0),
+    menu(0)
 {
-    optionsModel = 0;
     createContextMenu();
     setToolTip(tr("Unit to show amounts in. Click to select another unit."));
 }
@@ -1069,4 +1099,3 @@ void UnitDisplayStatusBarControl::onMenuSelection(QAction* action)
         optionsModel->setDisplayUnit(action->data());
     }
 }
-
diff --git a/src/qt/bitcoingui.h b/src/qt/bitcoingui.h
index 30dd7ae31..30b05cb7d 100644
--- a/src/qt/bitcoingui.h
+++ b/src/qt/bitcoingui.h
@@ -103,6 +103,7 @@ private:
     QAction *showHelpMessageAction;
 
     QSystemTrayIcon *trayIcon;
+    QMenu *trayIconMenu;
     Notificator *notificator;
     RPCConsole *rpcConsole;
 
@@ -219,6 +220,7 @@ protected:
 private:
     OptionsModel *optionsModel;
     QMenu* menu;
+
     /** Shows context menu with Display Unit options by the mouse coordinates */
     void onDisplayUnitsClicked(const QPoint& point);
     /** Creates context menu, its actions, and wires up all the relevant signals for mouse events. */