diff -Naur ../user_import_old/supported/user.inc ./supported/user.inc
--- ../user_import_old/supported/user.inc	2009-08-04 19:26:41.596540681 -0700
+++ ./supported/user.inc	2009-08-04 19:25:33.343012871 -0700
@@ -94,6 +94,9 @@
     if ($update_setting_per_module['password'] == UPDATE_REPLACE) {
       $account_add['pass'] = (empty($fields['user']['password'][0])) ? user_password() : $fields['user']['password'][0];
     }
+    else {
+      $account_add['pass'] = "";
+    }
     
     // update contact
     if ($update_setting_per_module['contact'] == UPDATE_REPLACE) {