Index: input_formats.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/input_formats/input_formats.module,v
retrieving revision 1.18
diff -u -p -r1.18 input_formats.module
--- input_formats.module	30 Aug 2010 17:41:39 -0000	1.18
+++ input_formats.module	7 Dec 2010 12:57:27 -0000
@@ -512,8 +512,8 @@ function input_formats_delete_variables(
  */
 function input_formats_save(&$input_format, $new = TRUE) {
   if ($new) {
-    db_query("INSERT INTO {filter_formats} (name) VALUES ('%s')", $input_format->name);
-    $input_format->format = db_result(db_query("SELECT MAX(format) AS format FROM {filter_formats}"));
+    db_query("INSERT INTO {filter_formats} (name) SELECT name FROM (SELECT '%s' AS name) AS t WHERE NOT EXISTS (SELECT * FROM {filter_formats} WHERE name = '%s')", $input_format->name, $input_format->name);
+    $input_format->format = db_result(db_query("SELECT format FROM {filter_formats} WHERE name = '%s'", $input_format->name));
   }
   else {
     if (empty($input_format->format)) {