Pam_Putenv Message

[Jeff Grossman <jeff@stikman.com>]

I noticed in my messages log file this line everytime I log out via ssh.

May 26 20:50:10 apple login[13572]: pam_mail(login:session): pam_putenv: delete non-existent entry; MAIL


This is on an AMD64 machine running Lenny. Is this bad? How do I get rid 
of it?

Thanks,
Jeff