The smart search index needs to be rebuilt after updating to this version.

When checking the status of the smart search index the mapping is compared with the current configuration.
Adding or changing labels of a
  – List
  – CustomField
  – Lov
  – Status
  – Priority
  – UserGroup
  – OrganisationUnit
requires an index update.
If a change is detected, the affected items are detected so that the index can be updated by updating the mapping and reindexing the affected items only.
If ActiveLanguages was changed the index needs to be rebuilt from scrach.

The /config/parameters#search page has an improved interface to deal with index management.
Some buttons are added and feedback & status information are improved.