log_collector doesn't respond to reloads

Summary: despite pg_reload(), log directory, filename and destination
don't change

Version: 9.1.3
Platform: RHEL5, custom compile
Severity: Persistant annoyance

Description:

1) change log_directory in postgresql.conf
2) pg_reload_conf()
3) show log_directory displays the correct new directory
4) logging continues to the old directory

Given the custom compile, I'd chalk this up to wonky platform issues,
except that I've seen this problem on other systems, intermittently.
This particular system has the issue in 100% reproduceable fashion, so
I'd like suggestions on how to get to the bottom of it.

I also tried a sighup to the logger process, with no effect.

--
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com