Well, upon a helpful suggestion, I actually rtfm'ed, and here we are (from perldoc Net::LDAP::Entry):

       get_value ( ATTR [, OPTIONS ] )
           Get the values for the attribute ATTR. In a list
           context returns all values for the given attribute, or
           the empty list if the attribute does not exist. In a
           scalar context returns the first value for the
           attribute or undef if the attribute does not exist.

           The return value may be changed by OPTIONS, which is a
           list of name => value pairs, valid options are :-
[download]

Unfortunately, there's little to do but read everything that can hold more than one value into an array. Ack. If anyone knows an elegant way to determine whether an attribute *can* hold multiple values (it looks as if they all may, at least potentially), I'm all ears.

--TQuid