CentriQS development team has improved the usage of Firebird database in contention mode. The improvement helps avoid the situation when two or more processes are waiting for each other to finish. If you use Firebird database and get deadlock errors often, you can update to version 2.1.1080 to reduce or eliminate this type of issue.
Problem with domain user accounts is another important issue that is solved in the new version. In some cases domain users were not added properly to CentriQS from Active Directory and domain user ID was not determined. If you have domain users and groups in your database, you must update to the latest version to fix the problem.
Learn more about the fixed issues in CentriQS version history