From Brian B.:

This commit lowers the priority of the darwin backtrace component
below that of the ''execinfo'' and ''stackprint'' components, which
will cause OS X Leopard to use the ''execinfo'' component.  execinfo
utilizes a public API for printing the stacktrace.  The ''darwin''
component uses some evil hacks and a not-so supported package from
Apple to print the stack trace.  

This commit was SVN r17840.

opal/mca/backtrace/darwin/configure.params

@@ -11,5 +11,5 @@
 
 # Specific to this module
 
-PARAM_CONFIG_PRIORITY=30
+PARAM_CONFIG_PRIORITY=20
 PARAM_CONFIG_FILES="Makefile"