Cryptopia says that DARK has a new "fork" but the chain will not fork because of the upgrade. There were no changes to the core that would cause a fork. The Cryptopia block explorer has remained on the same chain as the seed nodes and rest of the network. No second chains have been found on the network since the upgrade.

We are still waiting on Cryptopia to update it's DARK wallet, but they are still working hard on their own website updates.