OpenSIPS 1.5.2 is a minor release of 1.5 branch. This release contains only bug fixing (additional to 1.5.1) - no functionality, scripting or interfacing was changed.
OpenSIPS 1.5.2 contains critical fixed related to MySQL prepared statements implementation, to the Transaction engine (TM) and to the XMLRPC interface - it is highly recommended to upgrade, as it provides important stability improvements - OpenSIPS 1.5.2 is now available for download on project web site and SF download system.
The full Changelog is available here.
To get the OpenSIPS 1.5.2 version, see the Downloads page.