You need to update grub as per http://www.opensolaris.org/jive/thread.jspa?threadID=66519&tstart=0
" >>>>>>>>>> IMPORTANT <<<<<<<<<< Due to changes in the GRUB boot system, one must manually update the Master Boot Record (MBR) to include these latest changes. Failure to follow these instructions when updating from 2008.05 (build 86) to a later build will result in a system that does not boot by default and instead the original BE must be manually selected. Update the GRUB configuration on your ZFS boot device(s) using $ pfexec /tmp/mnt$$/boot/solaris/bin/update_grub -R /tmp/mnt$$ " This message posted from opensolaris.org
