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doc/release-notes/bitcoin/release-notes-0.8.4.md

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+Bitcoin-Qt version 0.8.4 is now available from:
+  http://sourceforge.net/projects/bitcoin/files/Bitcoin/bitcoin-0.8.4/
+
+This is a maintenance release to fix a critical bug and three
+security issues; we urge all users to upgrade.
+
+Please report bugs using the issue tracker at github:
+  https://github.com/bitcoin/bitcoin/issues
+
+
+How to Upgrade
+--------------
+
+If you are running an older version, shut it down. Wait
+until it has completely shut down (which might take a few minutes for older
+versions), then run the installer (on Windows) or just copy over
+/Applications/Bitcoin-Qt (on Mac) or bitcoind/bitcoin-qt (on Linux).
+
+If you are upgrading from version 0.7.2 or earlier, the first time you
+run 0.8.4 your blockchain files will be re-indexed, which will take
+anywhere from 30 minutes to several hours, depending on the speed of
+your machine.
+
+0.8.4 Release notes
+===================
+
+Security issues
+---------------
+
+An attacker could send a series of messages that resulted in
+an integer division-by-zero error in the Bloom Filter handling
+code, causing the Bitcoin-Qt or bitcoind process to crash.
+Bloom filters were introduced with version 0.8, so versions 0.8.0
+through 0.8.3 are vulnerable to this critical denial-of-service attack.
+
+A constant-time algorithm is now used to check RPC password
+guess attempts; fixes https://github.com/bitcoin/bitcoin/issues/2838
+(CVE-2013-4165)
+
+Implement a better fix for the fill-memory-with-orphan-transactions
+attack that was fixed in 0.8.3. See
+https://bitslog.wordpress.com/2013/07/18/buggy-cve-2013-4627-patch-open-new-vectors-of-attack/
+for a description of the weaknesses of the previous fix.
+(CVE-2013-4627)
+
+Bugs fixed
+----------
+
+Fix multi-block reorg transaction resurrection.
+
+Fix non-standard disconnected transactions causing mempool orphans.
+This bug could cause nodes running with the -debug flag to crash.
+
+OSX: use 'FD_FULLSYNC' with LevelDB, which will (hopefully!)
+prevent the database corruption issues many people have
+experienced on OSX.
+
+Linux: clicking on bitcoin: links was broken if you were using
+a Gnome-based desktop.
+
+Fix a hang-at-shutdown bug that only affects users that compile
+their own version of Bitcoin against Boost versions 1.50-1.52.
+
+Other changes
+-------------
+
+Checkpoint at block 250,000 to speed up initial block downloads
+and make the progress indicator when downloading more accurate.
+
+
+Thanks to everybody who contributed to the 0.8.4 releases!
+----------------------------------------------------------
+
+Pieter Wuille
+Warren Togami
+Patrick Strateman
+pakt
+Gregory Maxwell
+Sergio Demian Lerner
+grayleonard
+Cory Fields
+Matt Corallo
+Gavin Andresen