# CiviCRM 5.1.1

Released May 15, 2018

- **[Synopsis](#synopsis)**
- **[Features](#features)**
- **[Bugs resolved](#bugs)**
- **[Credits](#credits)**
- **[Feedback](#feedback)**

## <a name="synopsis"></a>Synopsis

| *Does this version...?*                                         |         |
|:--------------------------------------------------------------- |:-------:|
| Fix security vulnerabilities?                                   |   no    |
| Change the database schema?                                     |   no    |
| **Alter the API?**                                              | **yes** |
| Require attention to configuration options?                     |   no    |
| Fix problems installing or upgrading to a previous version?     |   no    |
| Introduce features?                                             |   no    |
| **Fix bugs?**                                                   | **yes** |

## <a name="features"></a>Features

- **Add API action to rebuild multilingual schema
  ([12112](https://github.com/civicrm/civicrm-core/pull/12112))**

  This adds a new API to assist administrators who encounter
  upgrade issues on multi-lingual sites.

## <a name="bugs"></a>Bugs resolved

- **Searching on non-primary addresses throws DB error
  ([12133](https://github.com/civicrm/civicrm-core/pull/12133))**
- **Email invoice fails with validation error
  ([12134](https://github.com/civicrm/civicrm-core/pull/12134))**

## <a name="credits"></a>Credits

This release was developed by the following authors and reviewers:

Australian Greens - Seamus Lee; JMA Consulting - Monish Deb; Lighthouse
Design and Consulting - Brian Shaughnessy; Wikimedia Foundation - Eileen
McNaughton

## <a name="feedback"></a>Feedback

These release notes are edited by Tim Otten and Andrew Hunt.  If you'd like to
provide feedback on them, please login to https://chat.civicrm.org/civicrm and
contact `@agh1`.