[Sunhelp] Feedback desired Solaris 2.5.1 upgrade to 2.6

[Tom Jones]

I'm a new sysadmin (formerly a Sun reseller engineer) and have been tasked
with
upgrading to Solaris 2.6 from 2.5.1 on two Ultras.  The first server is a
Netscape Mail and backup DNS server.  The second server is the primary DNS,
DHCP, and Cisco Secure server.  Both servers are running Disksuite (unsure
of the version - may also
upgrade it to 4.1)

I'm looking for feedback on the upgrade, specifically any problems, required
changes to
the mentioned applications, etc.

TIA,
Tom Jones