Directed to gappiah: THANKS for posting your solution. After upgrading to version 2.8 of WordPress I noticed that the post revisions were again being retained. I had previously installed WP-CMS Post Control to turn them off and somehow the parameter had been changed back to the “WordPress Default” (of retaining them) after the upgrade. However, by including one of the ‘define’ lines you’ve described (see below for reference) I was able to make use of all of the other uses of WP-CMS Post Control [AND] adjust my wp-config.php file to retain 2 revisions for each post, which I may yet revise but still on the fence about.
define(‘WP_POST_REVISIONS’,2); // only keep last 2 revisions
So again, thanks for posting the solution as well as the many different alternatives. Much appreciated, Michael