Version 4.4 (and 4.4p1) of OpenSSH was released yesterday.  Among other things, it fixed the vulnerability announced earlier this week (CVE-2006-4924) in the CRC compensation attack detector that allowed for a denial of service if using SSH protocol verion 1 (which hopefully no one is using anymore anyway due to the other weaknesses in the protocol).

See http://www.openssh.com for more details.