Important Changes
- ParityDB path may changes: paritytech/substrate#9971
For more information check the polkadot release notes. - Block authorship soft deadline: paritytech/substrate#9663
- Change the way the runtime upgrades of parachains are signaled: #517
THIS REQUIRES THAT COLLATORS ARE UPDATED BEFORE DOING THE RUNTIME UPGRADE
Note: Any older version enact an upgrade can do so, but FIRST all collators must be running 0.9.12 when this upgrade is realized. - Ensure that broken data is ignored: #701
Find full Substrate changelog: paritytech/substrate@polkadot-v0.9.11...polkadot-v0.9.12