Well, I just updated my phpdig to 1.6.5 and tried out indexing the site.
It works up to a point with the web interface and then gives me the following message from the web browser:
Could not open the page “
http://12.17.172.219/phpdig1/admin/spider.php” after trying for 60 seconds.
All the pages that it indexes up to that point are fine. I am going to try it from the command line, where the timeout should not apply.