SQL error when sorting Bibliography by author

I'm using the Bibliography module against a PostgreSQL database, and when attempting to sort the Bibliography by author I get the following error:

* warning: pg_query() [function.pg-query]: Query failed: ERROR: for SELECT DISTINCT, ORDER BY expressions must appear in select list in /usr/local/www/drupal6/includes/database.pgsql.inc on line 139.
* user warning: query: SELECT DISTINCT(n.nid), n.*, b.*, bt.name as biblio_type_name FROM (SELECT DISTINCT ON (nid) * FROM node) n left join biblio b on n.vid=b.vid inner join biblio_types bt on b.biblio_type=bt.tid INNER JOIN biblio_contributor as bc on b.vid = bc.vid JOIN biblio_contributor_data as bcd on bc.cid = bcd.cid INNER JOIN node_access na ON na.nid = n.nid WHERE (na.grant_view >= 1 AND ((na.gid = 0 AND na.realm = 'all') OR (na.gid = 0 AND na.realm = 'og_public'))) AND ( (bc.rank=0) AND (bc.auth_category=1) AND (n.type='biblio' ) AND (n.status = 1 ) )ORDER BY bcd.lastname desc LIMIT 25 OFFSET 0 in /usr/local/www/drupal6/sites/all/modules/biblio/biblio.pages.inc on line 87.

If I modify the code on my test system and replace the

$selects[] = "DISTINCT(n.nid)"; (line 111 or thereabouts in biblio.pages.inc)

portion with

$selects[] = "n.nid"

it seems to work as expected; however, I don't have a mySQL system that I can use to confirm that it works properly.

If I leave the $select[] statement unchanged, and simply modify the $sortby variable to be "ORDER BY n.nid, ..." then the entries are returned but are sorted in nid order not alphabetical (which is how they should be).