Laurent, if you keep this up, I'm going to think you're mystical. Putting mylogger into the www group did fix the "problem". And not without a sigh of relief!
FYI: The fifo queue permissions, which the jail sees pr---w---- 1 mylogger www 0B May 31 13:27 apache24-error| The final log repository, in the logging jail # ls -lrth /var/log/httpd/error -rw-r--r-- 1 mylogger www 0B Jun 18 07:43 state -rw-r--r-- 1 mylogger www 0B Jun 18 07:43 lock -rw-r--r-- 1 mylogger www 0B Jun 18 07:43 current -rwxr--r-- 1 mylogger www 329B Jun 18 07:43 @400000005d08099e33134f4c.s* but now with www:*:80:mylogger Thank-you. Regards, Dewayne PS. I'll investigate the u:x and o:r permissions later.