I commented out “$wp_rewrite->flush_rules();” in my functions-post.php file and am now able to post and edit pages without a problem. I’m no php pro. Does anyone know what the flush_rules function does? Is it going to cause problems if I disable it? Thanks.
Did you discover an answer? I am having the same problem since upgrading to WP 2.0.1. When updating a page, I get
Fatal error: Call to undefined function: flush_rules() in …/wp-includes/functions-post.php on line 200.
But line 200 has only some comments on it. Any clues?