--- a/userlibandfileserver/fileserver/sfile/sf_cache_man.cpp	Wed Jul 21 14:46:58 2010 +0100
+++ b/userlibandfileserver/fileserver/sfile/sf_cache_man.cpp	Thu Jul 22 16:46:39 2010 +0100
@@ -177,7 +177,7 @@
 	iMaxLockedSegments = TGlobalFileCacheSettings::MaxLockedSize() >> KSegmentSizeLog2;
 
 #ifdef __SIMULATE_LOCK_FAILURES__
-	iSimulateLockFailureMode = ETrue;
+	iSimulateLockFailureMode = EFalse;	// off by default unless switched on by KControlIoSimulateLockFailureMode
 #endif
 	}