OpenSSL 0.9.4 and OpenSSH for FreeBSD do not properly check for the existence of the /dev/random or /dev/urandom devices, which are absent on FreeBSD Alpha systems, which causes them to produce weak keys which may be more easily broken.
http://www.securityfocus.com/bid/1340
http://archives.neohapsis.com/archives/freebsd/2000-06/0083.html