XNAT 1.9.2.1 Release Notes
XNAT 1.9.2.1 is a hotfix release, addressing a small number of critical issues found in XNAT 1.9.2. This release does not have any effect on plugin compatibility, and it is otherwise identical to the updates in XNAT 1.9.2. See XNAT 1.9.2 Release Notes for reference.
Fixes:
XNAT-8388: Addresses a bug where extraneous localdb authorizations were created by a REST call to create users with LDAP-only authorization.
XNAT-8415: Adds two prearchive optimizations to improve performance when consuming high volumes of data
XNAT-8421: Fixes a memory consumption issue in the Prearchive when importing high volumes of data