"Related tags" in tag_view_page.php, is not showed consistently
This is reproducible in non-mysql databases, due to the query being incorrectly built.

This is the wrong query built in pgsql:

SELECT * FROM mantis_bug_tag_table

WHERE tag_id != $4 AND bug_id IN ( SELECT b.id FROM mantis_bug_table b

LEFT JOIN mantis_project_user_list_table p

ON p.project_id=b.project_id AND p.user_id=$1 JOIN mantis_user_table u

ON u.id=$2 JOIN mantis_bug_tag_table t

ON t.bug_id=b.id

WHERE ( p.access_level>b.view_state OR u.access_level>b.view_state )

AND t.tag_id=$3 )

with the parameters passed as:
( $p_tag_id, $c_user_id, $c_user_id, $p_tag_id )