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Important security fix for 7.x-1.x branch. Updating this this release is highly recommended.
Other fixes and improvements:
i) Issue #1194418 by tim.hidalgo: Undefined property: stdClass::$nid in document_form()
ii) Issue #1216300 by tshakah: "would be" repetition in content types description.
iii) Issue #1305930 by duncan.moo: Resolved Drupal 7 port issues for admin and moderation form..
iv) Resolved Drupal 7 port issues for search form.
v) Issue 1241276 by John_NL: Fixed document deletion errors.
vi) Resolved undefined property warning when updating a document node outside the standard node edit form (e.g. during Publish/Unpublish).
vii) Fixed extracting document vocabulary terms when node language is set to 'und'.
viii) Resolved Drupal 7 port issues for document block forms.
ix) Issue 1478972 by loopy1492: Added ability to control allowed file extensions for uploaded documents.