Index: openacs-4/packages/xowiki/tcl/xowiki-www-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xowiki/tcl/xowiki-www-procs.tcl,v
diff -u -r1.287 -r1.288
--- openacs-4/packages/xowiki/tcl/xowiki-www-procs.tcl	15 Nov 2010 13:49:07 -0000	1.287
+++ openacs-4/packages/xowiki/tcl/xowiki-www-procs.tcl	14 Jan 2011 10:37:43 -0000	1.288
@@ -1456,7 +1456,8 @@
     set save_slot $slot
     if {$slot eq ""} {
       # We have no slot, so create a minimal slot. This should only happen for instance attributes
-      set slot [::xo::Attribute new -pretty_name $name -datatype text -volatile -noinit]
+      set slot [::xo::Attribute new -pretty_name $name -datatype text -noinit]
+      $slot destroy_on_cleanup
     }
 
     set spec_list [list]