/usr/sbin is installed with 750 permissions. As various programs (/e.g.
sendmail) that normal users execute reside here, I suggest leaving it at
755. (Mailer hanging is really bad ;-)
I can't reproduce this here; on all our 6.2 boxes,
/usr/sbin is 0755.h
I had the effect when upgrading 6.1 to 6.2 on both intel and sparc.