debug_print_plan (pg7.4) doesn't seem to do anything

I have the following settings:
syslog = 2
client_min_messages = notice
log_min_messages = debug5 (tried debug1 too)
log_error_verbosity = default (tried verbose too, but still doesn't
print plan)
log_statement = true
log_duration = true
debug_print_plan = true
debug_print_parse = true

I thought setting debug_print_plan was supposed to explain every query
in my log file? I don't see the plan print either.

I'm running version 7.4.6 (from fink) on OS X 10.3.7.

Thanks.

Eric Brown
408-571-6341
www.propel.com