--- sites/all/modules/workspace/workspace.module	2008-08-07 04:49:45.000000000 +0200
+++ sites/all/modules/workspace/workspace.module	2009-10-28 01:18:54.000000000 +0100
@@ -489,7 +489,7 @@ function workspace_add_form_submit($form
       $options[$type] = $object->name;
     }
     if (isset($options[$node_type])) {
-      drupal_goto('node/add/' . $node_type);
+      drupal_goto('node/add/' . str_replace('_', '-', $node_type));
     }
   }
 }