DS version: 2012-05-09
For this error:
Notice: Undefined index: taxonomy_term in taxonomy_field_formatter_view() (line 1488 of ......../drupal-7.14/pressflow/demo/modules/taxonomy/taxonomy.module).
EntityMalformedException: Missing bundle property on entity of type taxonomy_term. in entity_extract_ids() (line 7539 of ........../drupal-7.14/pressflow/demo/includes/common.inc).
Found the problem and I can re-produce it every time! The formats for the Taxonomy Field: "Rendered taxonomy term" and "Seperated".
After a fresh D7.14 install, I systematically enabled modules (Entity API, fieldgroup, Renderable Elements, DS) and tested taxonomy terms using "Preview" on an Article with the "Default" format "Link". It was not until I installed DS and changed it to either one of the DS formats when I get this error. It only does this when you enter a term, other wise having defined terms or not, when you enter a term it will cause the error.