New clients trying to sync calculate retarget using KGW from block 1120000 and onwards, but krugercoin.miners-pool.eu has already calculated that block and added it to their chain using the old algo. So the local client will say hang on, the difficulty retarget that krugercoin.miners-pool.eu is suggesting is not the same as mine; disconnect for misbehaving.
You're right! The block 1120000 is on old algo, even miners-pool blockchain is broken! (1120000 was definitely not a good setting)
I shut down pool on miners-pool.eu, blockchain is broken, we have to wait a new version with checkpoints.