Database: MSSQL Server
Click on Docs menu-link throws the following error.

APPLICATION ERROR 0000401
Database query failed. Error received from database was 0000107: The column prefix 'pft' does not match with a table name or alias name used in the query. for the query: SELECT pft.id, pft.project_id, pft.filename, pft.filesize, pft.title, pft.description, pft.date_added
FROM mantis_project_file_table pft, mantis_user_table ut
LEFT JOIN mantis_project_table pt on pft.project_id = pt.id
LEFT JOIN mantis_project_user_list_table as pult
on pft.project_id = pult.project_id and pult.user_id = 1
WHERE ut.id = 1 AND pft.project_id in (0) AND
( pt.view_state = 10 OR pt.view_state is null OR
( pt.view_state = 50 and pult.user_id = 1 ) OR
( pult.user_id is null and ut.access_level >= 0 ) )
ORDER BY pt.name ASC, pft.title ASC

I copy pasted this sql in SQL Server's query analyzer window and it shows the same error. Tried it with MySQL and it seems to be fine.
So looks like its SQL Server specific.