Bitcoin-Qt version 0.8.3 is now available from: http://sourceforge.net/projects/bitcoin/files/Bitcoin/bitcoin-0.8.3/
This is a maintenance release to fix a denial-of-service attack that can cause nodes to crash.
Please report bugs using the issue tracker at github: https://github.com/bitcoin/bitcoin/issues
0.8.3 Release notes
Truncate over-size messages to prevent a memory exhaustion attack.
Fix a regression that causes excessive re-writing of the 'peers.dat' file.
Thanks to Peter Todd for responsibly disclosing the vulnerability ( CVE-2013-4627 ) and creating a fix.