Hi, I have finally turned the crank and cut 4.6.6. It includes the infamous barrier patch along with a few other nice patches. See http://www.rtems.com/rtems-4.6/index.html#466 for details. The download links0 are: ftp://ftp.rtems.com/pub/rtems/4.6.6 or http://www.rtems.com/ftp/pub/rtems/4.6.6 --joel