Index: /trunk/src/VBox/Frontends/VirtualBox/src/settings/machine/UIMachineSettingsStorage.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/settings/machine/UIMachineSettingsStorage.cpp	(revision 66566)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/settings/machine/UIMachineSettingsStorage.cpp	(revision 66567)
@@ -159,7 +159,7 @@
 
     /** Returns whether the @a other passed data is equal to this one. */
-    bool operator==(const UIDataSettingsMachineStorage& /* other */) const { return true; }
+    bool operator==(const UIDataSettingsMachineStorage & /* other */) const { return true; }
     /** Returns whether the @a other passed data is different from this one. */
-    bool operator!=(const UIDataSettingsMachineStorage& /* other */) const { return false; }
+    bool operator!=(const UIDataSettingsMachineStorage & /* other */) const { return false; }
 };
 
@@ -4360,8 +4360,4 @@
         fSuccess = m_machine.isOk() && comAttachment.isNotNull();
 
-        /* Show error message if necessary: */
-        if (!fSuccess)
-            msgCenter().cannotSaveStorageSettings(m_machine, this);
-
         /* Make sure attachment doesn't exist: */
         if (fSuccess)