Kamailio SIP Server v3.3.6stable is out – a minor release including fixes in code and documentation since v3.3.5 – configuration file and database compatibility is preserved.
Kamailio (former OpenSER) v3.3.6 is based on the latest version of GIT branch 3.3, therefore those running previous 3.3.x versions are advised to upgrade. There is no change that has to be done to configuration file or database structure comparing with older v3.3.x.
Be aware that this version marks the end of releases from branch 3.3. Current stable branches are now 4.1 and 4.0.