Index: openacs-4/packages/xowiki/tcl/xowiki-callback-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xowiki/tcl/xowiki-callback-procs.tcl,v
diff -u -r1.73.2.3 -r1.73.2.4
--- openacs-4/packages/xowiki/tcl/xowiki-callback-procs.tcl	31 Aug 2014 16:51:50 -0000	1.73.2.3
+++ openacs-4/packages/xowiki/tcl/xowiki-callback-procs.tcl	3 Sep 2014 14:33:29 -0000	1.73.2.4
@@ -48,6 +48,16 @@
         ::xo::db::sql::content_item delete -item_id $root_folder_id
       }
     }
+
+    set instance_name [db_string get_instance_name {
+      select instance_name from apm_packages where package_id = :package_id
+    }]
+    
+    ::xo::clusterwide ns_cache flush xotcl_object_type_cache package_id-$instance_name
+    ::xo::clusterwide ns_cache flush xotcl_object_type_cache -100-$instance_name    
+    ::xo::clusterwide ns_cache flush xotcl_object_type_cache package_key-$package_id
+    ::xo::clusterwide ns_cache flush xotcl_object_type_cache root_folder-$package_id
+
     ns_log notice "before-uninstantiate DONE"
   }
 
Index: openacs-4/packages/xowiki/www/admin/test.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xowiki/www/admin/Attic/test.tcl,v
diff -u -r1.36.2.3 -r1.36.2.4
--- openacs-4/packages/xowiki/www/admin/test.tcl	3 Sep 2014 12:27:48 -0000	1.36.2.3
+++ openacs-4/packages/xowiki/www/admin/test.tcl	3 Sep 2014 14:33:29 -0000	1.36.2.4
@@ -138,8 +138,8 @@
 
 # Make sure to delete the name entry in the cache in case, the instance was deleted
 # via low-level API
-::xo::clusterwide ns_cache flush xotcl_object_type_cache package_id-xowiki
-::xo::clusterwide ns_cache flush xotcl_object_type_cache -100-$instance_name
+#::xo::clusterwide ns_cache flush xotcl_object_type_cache package_id-xowiki
+#::xo::clusterwide ns_cache flush xotcl_object_type_cache -100-$instance_name
 
 #############################################################
 test subsection "Basic Setup: Package, url= /$instance_name/"