Automounter oddities. Directories accessible but permission denied on files.

I've having an odd problem. Over the weekend, we migrated many of our
filesystems to a NAS
our automounter file was changed, and everything looked good.
However, it seems that all was not well. Some of the _files_ in our home
directory root are reported
as not accessible ('permission denied').
The situation is that we mount /SiteWide/home with automounter.
/SiteWide/home/$user is the user directory, and
these are all correctly accessible. However, /SiteWide/home/login (our
login profile) reports permission denied when users try
to access it.
(automountd -v reports <server> automountd[$PID]: [daemon.error] mount of
/SiteWide/home/login failed into the messages log)

I'm currently looking at how to change the automount maps, but I'm _sure_
this worked before the move.
Any thoughts on how to troubleshoot this? I've checked file permissions on
the NAS, and they look good.
Mounting /fs/export/home on a temporary mount point looks fine (and is
readable by a standard user...)

It's probably something really obvious that I'm missing, but well.... it's
causing a few problems :)

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[1458 byte] By [CodeProf.com] at [2007-12-24 22:49:00]