Geth Classic v6.0.7-beta
Geth Classic v6.0.7-beta is a release that fixes a critical consensus-relevant issue dealing with various edge-cases discovered during tests on Morden testnet as part of the Atlantis protocol upgrade and applies EIP-684 as default to all chains to avoid splits.
Upgrading classic Geth nodes is highly recommended and mandatory to avoid chain splits after the Atlantis hardfork which is scheduled to activate in September on the Ethereum Classic main network.
The full list of introduced changes since the v6.0.6-beta release: