php_flag register_globals offSo I did. I got through installing the program, and a little way into testing (about 20 minutes later) when it quit working. I thought it was just the new software that was misconfigured, and I'd have to read up to find where the mistake was. So I decided to call it quits for the day. I didn't realize that the whole site went down until after midnight when I checked my traffic stats and discovered I had no traffic for the previous 6 hours.
I may still have to do a lot of reading to figure out the right way to configure the software.
My apologies to anyone who tried to view my web site.