LispWorks 6.0 PDF documentation

Hello lispworkers,

What is the version of the PDF files of  the documentation exposed on the
LispWorks site?
AcroReader 5.1, I am getting an error about unreadable files.

Fortunately, Foxit Reader is able to display them.
--
Sincerely,
Dmitriy Ivanov
lisp.ystok.ru