Index: code/branches/usability/src/orxonox/gamestates/GSLevel.cc
===================================================================
--- code/branches/usability/src/orxonox/gamestates/GSLevel.cc	(revision 7976)
+++ code/branches/usability/src/orxonox/gamestates/GSLevel.cc	(revision 7978)
@@ -55,5 +55,5 @@
 
     SetConsoleCommand(__CC_startMainMenu_name, &GSLevel::startMainMenu).deactivate();
-    SetConsoleCommand(__CC_changeGame_name, &GSLevel::changeGame).defaultValues(BLANKSTRING).deactivate();
+    SetConsoleCommand(__CC_changeGame_name, &GSLevel::changeGame).defaultValues("").deactivate();
 
     GSLevel::GSLevel(const GameStateInfo& info)
@@ -202,5 +202,5 @@
     /*static*/ void GSLevel::changeGame(const std::string& level)
     {
-        if(level != BLANKSTRING)
+        if(level != "")
             LevelManager::getInstance().setDefaultLevel(level);
 
Index: code/branches/usability/src/orxonox/gamestates/GSMainMenu.cc
===================================================================
--- code/branches/usability/src/orxonox/gamestates/GSMainMenu.cc	(revision 7976)
+++ code/branches/usability/src/orxonox/gamestates/GSMainMenu.cc	(revision 7978)
@@ -57,8 +57,8 @@
     static const std::string __CC_setMainMenuSoundPath_name = "setMMSoundPath";
 
-    SetConsoleCommand(__CC_startStandalone_name,      &GSMainMenu::startStandalone).defaultValues(BLANKSTRING).deactivate();
-    SetConsoleCommand(__CC_startServer_name,          &GSMainMenu::startServer    ).defaultValues(BLANKSTRING).deactivate();
-    SetConsoleCommand(__CC_startClient_name,          &GSMainMenu::startClient    ).defaultValues(BLANKSTRING).deactivate();
-    SetConsoleCommand(__CC_startDedicated_name,       &GSMainMenu::startDedicated ).defaultValues(BLANKSTRING).deactivate();
+    SetConsoleCommand(__CC_startStandalone_name,      &GSMainMenu::startStandalone).defaultValues("").deactivate();
+    SetConsoleCommand(__CC_startServer_name,          &GSMainMenu::startServer    ).defaultValues("").deactivate();
+    SetConsoleCommand(__CC_startClient_name,          &GSMainMenu::startClient    ).defaultValues("").deactivate();
+    SetConsoleCommand(__CC_startDedicated_name,       &GSMainMenu::startDedicated ).defaultValues("").deactivate();
     SetConsoleCommand(__CC_setMainMenuSoundPath_name, &GSMainMenu::setMainMenuSoundPath).hide();
 
@@ -176,5 +176,5 @@
     void GSMainMenu::startStandalone(const std::string& level)
     {
-        if(level != BLANKSTRING)
+        if(level != "")
             LevelManager::getInstance().setDefaultLevel(level);
 
@@ -192,5 +192,5 @@
     void GSMainMenu::startServer(const std::string& level)
     {
-        if(level != BLANKSTRING)
+        if(level != "")
             LevelManager::getInstance().setDefaultLevel(level);
 
@@ -208,5 +208,5 @@
     void GSMainMenu::startClient(const std::string& destination)
     {
-        if(destination != BLANKSTRING)
+        if(destination != "")
             Client::getInstance()->setDestination(destination, NETWORK_PORT);
 
@@ -224,5 +224,5 @@
     void GSMainMenu::startDedicated(const std::string& level)
     {
-        if(level != BLANKSTRING)
+        if(level != "")
             LevelManager::getInstance().setDefaultLevel(level);
 
Index: code/branches/usability/src/orxonox/gamestates/GSMainMenu.h
===================================================================
--- code/branches/usability/src/orxonox/gamestates/GSMainMenu.h	(revision 7976)
+++ code/branches/usability/src/orxonox/gamestates/GSMainMenu.h	(revision 7978)
@@ -53,8 +53,8 @@
         void setMainMenuSoundPath(const std::string& path);
 
-        static void startStandalone(const std::string& level = BLANKSTRING); //!< Start a level in standalone mode.
-        static void startServer(const std::string& level = BLANKSTRING); //!< Start a level in server mode.
-        static void startClient(const std::string& destination = BLANKSTRING); //!< Connect to a game as client.
-        static void startDedicated(const std::string& level = BLANKSTRING); //!< Start a level in dedicated mode.
+        static void startStandalone(const std::string& level = ""); //!< Start a level in standalone mode.
+        static void startServer(const std::string& level = ""); //!< Start a level in server mode.
+        static void startClient(const std::string& destination = ""); //!< Connect to a game as client.
+        static void startDedicated(const std::string& level = ""); //!< Start a level in dedicated mode.
         static void startIOConsole();
 
