diff -r 9d999fdda967 -r 57de231642e2 orte/mca/ess/slurmd/ess_slurmd_module.c
--- a/orte/mca/ess/slurmd/ess_slurmd_module.c	Fri Jun 04 15:29:28 2010 +0200
+++ b/orte/mca/ess/slurmd/ess_slurmd_module.c	Tue Jun 15 11:45:02 2010 +0200
@@ -387,7 +387,8 @@
             ORTE_ERROR_LOG(ret);
         }
     }
-    
+    unsetenv("OMPI_MCA_grpcomm");
+    unsetenv("OMPI_MCA_routed");
     /* deconstruct my nidmap and jobmap arrays - this
      * function protects itself from being called
      * before things were initialized