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написано прямо по линку:
The current plan for the 6.2 Release Cycle is available at:

http://www.freebsd.org/releases/6.2R/schedule.html

A few things to note about BETA1:

- Be aware that FreeBSD-SA-06:21.gzip was released after
  the -BETA1 builds started, and the gunzip(1) binaries
  included are consequently vulnerable to the attacks
  described in that advisory."

- The install media provided for this BETA do not include
  any packages (much like the monthly snapshot builds).
  Packages will probably not be provided on the install
  media until we reach the RC phase.

- The sparc64 build got started before an important bugfix
  was applied to auditctl(2) so testing Audit related things
  will be difficult or impossible on sparc64 BETA1 but the
  other available platforms should be fine in this regard.

- No BETA1 for the ia64 platform will be available.

- The build for Alpha is still in progress and will be
  available shortly.

- FreeBSD Update, a binary security update tool, was
  recently imported into the FreeBSD base system, and the
  FreeBSD Security Team is building binary security updates
  for the i386 platform.  Users are encouraged to