be logged out, and do a user search for "chris" (http://dc2009.drupalcon.org/attendees?keys=chris&tid=All)

view the sql error:

user warning: Got error -1 from storage engine query: SELECT tn.vid AS node_vid, td.* FROM term_data td INNER JOIN term_node tn ON td.tid = tn.tid WHERE tn.vid IN (1602, 1474, 1428, 1412, 1392, 964, 856, 474, 382, 314, 308, 200, 196, 174, 162, 158) AND td.vid IN (6) ORDER BY td.weight, td.name in /var/www/dc2009.drupalcon.org/htdocs/modules/acquia/views/modules/taxonomy/views_handler_field_term_node_tid.inc on line 83.

sorry, I've not seen that MySQL error before.