The 2.3.4. version includes:

• configuration within CMDBuild of custom layout pages using the CMDBuild GUI Framework
• printing PDF and CSV data contained in the SQL views "grid" (as it's already available in the filter views)
• LDAP authentication support in REST webservice (as well as in the “mobile app”)
• defining default filters for a class/group of users
• defining custom user messages for SQL exceptions
• new customForm "widget" which improves the current widget"grid"
• new Chinese localization
• bug fixing

For the complete list of changes please refer to the changelog.