I have a free-tagging vocabulary but can only get table drag hierarchy ability on admin/content/taxonomy/ [[vocab-id]] when the checkbox for "tags" is checked in the settings fieldset of admin/content/taxonomy/edit/vocabulary/ [[vocab-id]]

I posted this question to drupal.org here but no responses.

It seems to me to be a nonsensical restriction. So I wrote a small patch to fix it ( attached here ). Run this from drupal root. It will change the core taxonomy_overview_terms() function in taxonomy.admin.inc to give you drag&drop back.

I don't know if this will break under strain of large vocabularies. If you figure it out before I do, let me know :)