Fixed:
bug #614784 by bradweikel, pounard: Form API validation failure
bug #810830 by bradweikel, tahiticlic: Illegal Choice Error on vocabs that are required and hidden
bug #573778 by bradweikel, mas160: taxonomy defaults breaks core forum vocabulary
bug #982570: upgrade instructions needed
Additional cleanup:
Improved documentation and layout to better explain changes between 6.x-1.0 and 6.x-2.x
Cleaned up code to follow coding standards
Removed translations - they belong on localize.drupal.org now
Compared to 6.x-1.0:
Overhauled interface
Better performance & scalability
Lots of bug fixes
Note: In order to upgrade your "hidden" vocabularies from 6.x-1.0 or earlier, you'll need to enable the vocabulary/content type relationship on the taxonomy administration pages, and then turn off the associated "Visible" checkbox. The resulting behavior should be the same, but with less likelihood of bugs and conflicts with other modules.
Fixed installer error from beta1
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* Freetagging vocabs now use autocomplete instead of a dropdown selection box
* Logic change regarding hidden vocabs. You must now enable content types on the taxonomy
* added hook_requirements to verify module weighting
* added hook_taxonomy and hook_content_type to clean up settings
* added an update function that cleans out old orphaned data
