Avoid LDAP hit during completion

[Chris Wong <chris_wong@xxxxxxx>]

For some reason, whenever I start a zsh shell, the first completion  
will trigger many many LDAP lookup.

% cd foo<TAB>

As soon as I hit TAB, the shell appears as frozen, but at the  
background, it's hitting the LDAP server of my company network.  This  
will go one for a couple minutes, at least.  tcpdump and top revealed  
that mystery to me.

Is there any workaround for this?  I'd hate to use bash after years  
of using zsh.

Thanks for any help!
Chris

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