--- lib/python/OFS/CopySupport.py	Mon Apr 16 18:26:20 2001
+++ lib/python/OFS/CopySupport.py.new	Sun Jun 24 20:58:48 2001
@@ -281,9 +281,20 @@
         """Rename several sub-objects"""
         if len(ids) != len(new_ids):
             raise 'Bad Request','Please rename each listed object.'
+        conflicts = []    
         for i in range(len(ids)):
             if ids[i] != new_ids[i]:
+                if new_ids[i] not in ids :      # may a conflict occur ?
                 self.manage_renameObject(ids[i], new_ids[i], REQUEST)
+                else :        
+                        tempo = ".temporary_%i_" % i
+                        self.manage_renameObject(ids[i], tempo)
+                        conflicts.append((tempo, new_ids[i]))
+                        
+        # now we rename conflictuous objects                
+        for (old, new) in conflicts :               
+                self.manage_renameObject(old, new)
+                
         if REQUEST is not None:
             return self.manage_main(self, REQUEST, update_menu=1)
         return None