It looks like I got it figured out. Something corrupted tempspider SQL database table. I had used the
www.dol.state.nm.us site as an example. I suspect something broke the temporary table during a recent crawl.
Long story short, I went into the database and repaired the table using the phpmyadmin interface. Everything seems to be happy and content now.
I am using PhpDig 1.6.5.
John