Index: WorkspacesManagerExtension.java
===================================================================
--- WorkspacesManagerExtension.java	(revision 12676)
+++ WorkspacesManagerExtension.java	(working copy)
@@ -445,6 +445,13 @@
             gg.setStringValue("levels", "view");
             gg.setIntValue("allow", 0);
             gg.setLargeStringValue("groups", "");
+
+            // Deny view right to XWiki.XWikiAllGroup
+            BaseObject objAllGroup = doc.getObject("XWiki.XWikiGlobalRights", "groups", "XWiki.XWikiAllGroup");
+            if (objAllGroup != null) {
+            	// Zoubir : If object exist, we delete it and the space will be private.
+            	doc.removeObject(objAllGroup);
+            }
             context.getWiki().saveDocument(doc, context);
         } catch (XWikiException e) {
             throw new WorkspacesManagerException(e);