I was browsing through the code in web.tcl, version dated October 29, 2003,
and I saw in the proc cgi_mail_start, there's a command "chdir /home/jcw/data".
I suspect this line shouldn't be in there. Any other place in the code that accesses
the lock file, error file, or log file just does it's file processing in the
current directory.

Whoops - this made lock cleanup pretty useless on other systems. I've just
fixed it, thanks for letting me know.