--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,8 @@
+2011-01-22  John W. Eaton  <jwe@octave.org>
+
+	* symtab.h (symbol_table::parent_classes):
+	Also add parents of parents to the list.  Bug #32210.
+
 2011-01-22  Jaroslav Hajek  <highegg@gmail.com>
 
 	* ov-class.cc (octave_class::subsasgn): Find appropriate unique base

--- a/src/symtab.h
+++ b/src/symtab.h
@@ -1866,6 +1866,19 @@
     if (it != parent_map.end ())
       retval = it->second;
 
+    for (std::list<std::string>::const_iterator lit = retval.begin ();
+         lit != retval.end (); lit++)
+      {
+        // Search for parents of parents and append them to the list.
+
+        // FIXME -- should we worry about a circular inheritance graph?
+
+        std::list<std::string> parents = parent_classes (*lit);
+
+        if (! parents.empty ())
+          retval.insert (retval.end (), parents.begin (), parents.end ());
+      }
+
     return retval;
   }