We have a few Solaris 10 machines with zones and they backup fine.
Our zones are on local disk.  Are your zones on an NFS partition?
We run 5.1MP3 but Solaris 10 is supported on 5.0MP4 and up (for
Sparc client).  Have a look at the backup error logs, they might
say why it's not doing your zone partitions.  We didn't have
to change any settings in our policy to get it to work.

>Hello,
>
>       I have added 2 Solaris machines to a policy (System Backups) and
>this policy has been backing up "All_Local_drives" for several
machines running Solaris 9. The new machines are Solaris 10. Now the
>1st one that I added went smooth. Its backing up all data. On the
>second machine they seem to have set up multiple zones. I ran the back
>up and then restored and went looking through thins and found that the
>zones were missing. I had a backup of only 3.0G Any thoughts as to how
>to get the policy to back up all data on the local drive following
>these soft partitions for each zone.
>
>I seem to get the Zones directory under /  however the soft partitions
>for each zone are missing Im only able to get the global zone.
>
>Im am running Veritas NBU 5.0GA MP6 Enterprise under a solaris 9
>environment

-- 
Jeff Bryer                              bryer AT sfu DOT ca
Systems Administrator                   (604) 291-4935
Academic Computing, Simon Fraser University