after upgrade to snv_129 I was not able to login using ssh.
this is a known bug which can be solved by editing /etc/minor_perm
add the following:
"clone:ptmx 0666 root sys" to /etc/minor_perm
After reboot you can login again with ssh
(source: http://defect.opensolaris.org/bz/show_bug.cgi?id=12380)
