==== Patch <fix_1109> level 1
Source: [No source]
Target: 1a063a9b-81f0-0310-95a4-ce76da25c4cd:/trunk:2447 [mirrored]
        (http://svn.automattic.com/wordpress/trunk)
Log:
Bug fix for #1109
=== wp-admin/categories.php
==================================================================
--- wp-admin/categories.php  (revision 2447)
+++ wp-admin/categories.php  (patch fix_1109 level 1)
@@ -32,7 +32,11 @@
 	$category_nicename = sanitize_title($cat_name, $cat_ID);
 	$category_description = $_POST['category_description'];
 	$cat = intval($_POST['cat']);
+	// Let's check if the category already exists
 	
+	$cur_id = (int) $wpdb->get_var("SELECT cat_ID FROM $wpdb->categories WHERE cat_name = '$cat_name'");
+	if ($cur_id>0)
+		die(sprintf(__("Cannot create category. Category named '%s' already exists"), $cat_name));
 	$wpdb->query("INSERT INTO $wpdb->categories (cat_ID, cat_name, category_nicename, category_description, category_parent) VALUES ('0', '$cat_name', '$category_nicename', '$category_description', '$cat')");
 	
 	header('Location: categories.php?message=1#addcat');