drush complains it wants a recommended release when downloading this module:
$ drush dl ur_autocomplete
There is no *recommended* release for project ur_autocomplete on Drupal 6.x. Ask the maintainer to review http://drupal.org/node/197584 and create/recommend a release [ok]
in order to be compatible with drush and the drupal.org security broadcast system. A recommended development snapshot release is sufficient. Alternatively, run
pm-releases command and explicity pm-download any non-recommended release that might be available.