Download the update from GitHub here.
You can also download the Windows MSI here.
Mandatory bug fixes are tied to v9 blocks which will start on block 1144000.
Here is the changelog for this release:
Added
Provide Difficulty of best kernel found, #766 (@tomasbrod).
Add Travis support for OSX, #665 (@acey1).
Add better command for sending alerts, #731 (@tomasbrod).
Add RPC for sending raw contracts, #683 (@tomasbrod).
Add portable diagnostic page, #631 (@fooforever).
Fixed
Fixed minor spelling mistakes, #742 (@denravonska).
Several tally improvements. There should now be less forking and the wallet
should use ~50MB less memory, #668, #756 (@denravonska, @tomasbrod)
Data scraper can no longer run concurrently, #742 (@denravonska).
Improve superblock validations, #730 (@tomasbrod).
Fix potential deadlock, #708 (@denravonska).
Prevent duplicate superblocks, #534 (@tomasbrod).
Fix issue with application cache clears, #577 (@tomasbrod).
Fix bug which caused rewards to be lost when staking the newbie block.
Missing rewards will be reimbursed, #552 (@Foggyx420).
Fix minor UI typos, #661 (@Erkan-Yilmaz).
Fix stake modifier, #686 (@tomasbrod).
Improve boost-1.66.0 compatibility, #800 (@denravonska).
Fix crash in diagnostics dialog, #794 (@Foggyx420).
Changed
Changed versioning extraction from git. Test builds can no longer be used to
stake in production unless explicitly enabled, #729 (@tomasbrod).
Don't update network quorum while syncing, #728 (@Foggyx420).
Snapshot URL now uses https, #727 (@Foggyx420).
Code cleanup (@Foggyx420, @denravonska).
Use more efficient data structure for blocks, #679 (@denravonska).
Improve transaction description dialog, #676 (@Foggyx420).
Improve beacon handling, #604, #645, #649, #684, #701 (@Foggyx420, @tomasbrod).
Optimize double<->string conversions, #692 (@denravonska).
Optimize application cache access, #506 (@denravonska).
Improve thread handling, #656 (@skcin).
Replace boost::shared_ptr with std::shared_ptr.
Optimize string split function, #672 (@denravonska).
Improve sync speeds, #650 (@denravonska).
The RPC command restartclient is now called restart.
Fix voting sorting issues, #610 (@MagixInTheAir).
Improve wallet backup, #660 (@Foggyx420).
Update seed nodes, #783 (@barton2526).
Auto upgrades are now opt-in via the "autoupgrade" flag, #796 (@denravonska).
Clean up seed nodes, #783 (@barton2526).
Removed
Remove CSV exporter which used unreliable data, #759 (@denravonska).
Remove block download menu options on non-Windows, #727 (@Foggyx420).
Removed RPC commands (@Foggyx420, @denravonska):
debugexplainmagnitude
executecode
getsubsidy
list newbieage
list staking
leder
reboot
Remove checkpoint relaying to improve sync speeds, #678 (@denravonska).
Remove IRC peer discovery.
Thanks to all the great work by our devs who made this update possible! Please update your wallets to the new mandatory ASAP!