Incompatibility with Advanced Help module - returns help text as snippet

I have the Advanced Help module installed, and the help text is indexed in the search_index table, with the 'sid' field pointing to the associated record in the advanced_help_index table.

This means that the search_files_attachments_search function retrieves the search meta-data, and there are both a help text and an attachment with the same 'sid', the search snippet returned pulls the help text here:

$file = db_fetch_object(db_query("
                          SELECT f.*, d.data, u.nid
                           FROM {files} AS f
                           JOIN {upload} AS u
                           USING(fid)
                           INNER JOIN {search_dataset} AS d
                           ON f.fid = d.sid 
                           WHERE fid = %d
                          ", $item->sid));

If I modify this (and I'm not suggesting this is the fix for the issue) to:

$file = db_fetch_object(db_query("
                          SELECT f.*, d.data, u.nid
                           FROM {files} AS f
                           JOIN {upload} AS u
                           USING(fid)
                           INNER JOIN {search_dataset} AS d
                           ON f.fid = d.sid and d.type = 'search_files_att'
                           WHERE fid = %d
                          ", $item->sid));

then the proper snippet is returned.