Overview
This Hardfork is about changing the rewards curve to be stake proportional. The original proposal can be read on steemit.com.
Linear Rewards
With the introduction of a linear reward curve everyone will have a say directly proportional to their stake. #1051
Square Root Curation Rewards Curve
This is to offset the changes in rewards due to the linear reward curve. Curation rewards should stay roughly where they are. #1052
Increase Vote Impact
Each vote's impact has been increased by 4x. #1053
Witness Price Feeds Properly Expires
Fixed a bug that prevented price feeds from expiring. #882
Historical Posts Cannot Be Deleted
Once a post has existed for 7 days, it can no longer be deleted. #876
Cancelling a Steem Power Delegation Fixed
Fixed a bug that prevented cancelling a delegation in some circumstances #971
Deleting Post Condition Part of Consensus
Previously, requiring a post had 0 rshares before deletion was enforced via a soft fork. Now it is part of consensus #977
account_create_operation Fixed
There was a bug in the account_create_operation. Our short term fix was to temporarily disable the operation. It has been fixed and is re-enabled. #987
Fixed 0 Delegation Objects
Previously, creating an account with 100% STEEM would create a 0 delegation object. This has been fixed. #997
Optimized Full Node Reindex
Addressed several changes to increase full node reindex speed. #1160 #1161 #1162
New Follow Plugin Option
When starting the follow plugin you can specify an epoch time to start calculating user feeds --follow-start-feeds. Default is 0 to always calculate feeds.
Increased p2p Stability
Fixed an issue that was causing instability in the p2p network when live and when syncing.
Disable get_block at Runtime
With --disable-get-block you can disable get_block and get_block_header in the database API at runtime.
Source:-steemit/github
https://github.com/steemit/steem/releases
Thanks do follow and upvote plz.