This is not a maintenance full release for of the OpenMRS Core 2.1.x line. Anyone using a lower version of Core 2.1.x should upgrade to this releasePlatform, and it will not get Long Term support. It is intended for production use, but only if you are a developer who wants to always use a cutting-edge release of openmrs-core.
OpenMRS Core 2.1.1 is a maintenance release that fixes several bugs from Core 2.1.0. There are no database changes when upgrading from 2.1.0 to this version.