Index: main/sd/source/ui/unoidl/unomodel.cxx
===================================================================
--- main/sd/source/ui/unoidl/unomodel.cxx	(revision 1368353)
+++ main/sd/source/ui/unoidl/unomodel.cxx	(working copy)
@@ -802,7 +802,8 @@
 
 	if( !xMasterPages.is() )
 	{
-		initializeDocument();
+		if ( !hasControllersLocked() )
+			initializeDocument();
 		mxMasterPagesAccess = xMasterPages = new SdMasterPagesAccess(*this);
 	}