How can I turn off URL field settings?

For some reason (perhaps a module install that I lost track of ...) drupal has started requiring me to enter a url alias on each node page that I edit or create. I have path module enabled and I have tried clean URL's in the enabled and disabled settings. No help.

I have not been able to find an admin / config setting that causes this to be required or optional.

Any ideas? I'm stumped.

My system ...

Drupal 5.7
Configuration file Protected
Cron maintenance tasks Last run 3 days 23 hours ago
You can run cron manually.
Database schema Up to date
File system Writable (public download method)
JQuery Update Installed correctly
The current installed version of JQuery is 1.1.2
MySQL database 4.1.14
Organic groups modules Organic groups works best when job_queue.module.module is enabled. See the Integration section of the README file.
PHP 5.0.4
PHP register globals Disabled
Unicode library PHP Mbstring Extension
Web server Apache/2.0.54 (Fedora)

Thanks!