Diff displays only id for vocabulary / user fields

..# install Nuxeo

1. start Nuxeo
2. install Web UI addon
3. login as Administrator
4. create a Workspace
5. create a Note document named doc1 with the Nature field set to any value
6. create a Note document named doc2 with the Nature field set another value
7. inside the Workspace select doc1 and doc2
8. clic the Compare icon in the top-right part of the page.
9. observe the difference for the Nature field uses the id instead of the label.