Error while trying to filter quotes using taxonomy

Hi,
When I tried to filter quotes using taxonomy I received this error:
user warning: Column 'nid' in from clause is ambiguous query: SELECT DISTINCT(n.nid) FROM quotes q INNER JOIN node n ON q.vid=n.vid INNER JOIN term_node qtn USING(nid) WHERE n.status=1 AND n.type='quotes' AND q.promote = 1 AND qtn.tid IN (5) ORDER BY RAND() LIMIT 0, 1 in /home/piotr/websites/drupal/sites/all/modules/quotes/quotes.module on line 1240.

Problem could be solved by replacing USING with ON in quotes_block_join_sql(). For example line that caused my problem could be altered from:
$join .= " INNER JOIN {term_node} $aliases[term_node] USING(nid) ";
to:
$join .= " INNER JOIN {term_node} $aliases[term_node] ON $aliases[node].nid=$aliases[term_node].nid ";

Piotr