Index: /trunk/src/VBox/Devices/Storage/DrvVD.cpp
===================================================================
--- /trunk/src/VBox/Devices/Storage/DrvVD.cpp	(revision 26205)
+++ /trunk/src/VBox/Devices/Storage/DrvVD.cpp	(revision 26206)
@@ -1119,5 +1119,5 @@
                 break;
             }
-            rc = CFGMR3QueryBoolDef(pCurNode, "UseNewIo", &fUseNewIo, true);
+            rc = CFGMR3QueryBoolDef(pCurNode, "UseNewIo", &fUseNewIo, false);
             if (RT_FAILURE(rc))
             {