This error shows up:

Query failed:
SELECT


e.id,
e.title,
e.timestamp,
e.comments,
e.exflag,
e.authorid,
e.trackbacks,
e.isdraft,
e.allow_comments,
e.last_modified,

a.realname AS author,
a.email

, e.body, e.extended

FROM
serendipity_entries AS e
LEFT JOIN serendipity_authors ...