Index: openacs-4/packages/acs-kernel/sql/postgresql/acs-objects-create.sql
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-kernel/sql/postgresql/acs-objects-create.sql,v
diff -u -N -r1.51 -r1.52
--- openacs-4/packages/acs-kernel/sql/postgresql/acs-objects-create.sql	18 Jun 2004 18:21:57 -0000	1.51
+++ openacs-4/packages/acs-kernel/sql/postgresql/acs-objects-create.sql	26 Jul 2004 12:21:40 -0000	1.52
@@ -257,10 +257,12 @@
 
 create function acs_objects_last_mod_update_tr () returns opaque as '
 begin
-  new.last_modified := now();
-
+  if new.last_modified is null then
+     new.last_modified := old.last_modified;
+  elsif new.last_modified = old.last_modified then
+     new.last_modified := now();
+  end if;
   return new;
-
 end;' language 'plpgsql';
 
 create trigger acs_objects_last_mod_update_tr before update on acs_objects