Upgrade cSO from 3.2.1 to 3.2.2

According to the documentation in Fix Explorer on Servline24, applying the 3.2.2 patches to cSO 3.2.1 upgrades the version and provides compatibility with CentraSite 3.x. The documentation does not say if compatibility to CentraSite 2.x is retained or not. Can someone enlighten me?