Index: wp-includes/wp-db.php
===================================================================
--- wp-includes/wp-db.php	(revision 12400)
+++ wp-includes/wp-db.php	(working copy)
@@ -1052,9 +1052,9 @@
 	function check_database_version()
 	{
 		global $wp_version;
-		// Make sure the server has MySQL 4.0
-		if ( version_compare($this->db_version(), '4.0.0', '<') )
-			return new WP_Error('database_version',sprintf(__('<strong>ERROR</strong>: WordPress %s requires MySQL 4.0.0 or higher'), $wp_version));
+		// Make sure the server has MySQL 4.1
+		if ( version_compare($this->db_version(), '4.1.0', '<') )
+			return new WP_Error('database_version',sprintf(__('<strong>ERROR</strong>: WordPress %s requires MySQL 4.1.0 or higher'), $wp_version));
 	}
 
 	/**