Is there a way to prevent duplicate taxonomy terms in Drupal (7)?

Question

I'm using a free-tagging system in Drupal and am running into a problem: if I re-use a taxonomy term, it is added (redundantly) to the taxonomy vocabulary. Is there a way to limit a vocabulary to distinct terms?

Answer 1

here is the module for this.

http://drupal.org/project/taxonomy_dupecheck

hope that helps