We are currently running Zimbra 6 on Ubuntu 8. Instead of upgrading Zimbra to version 7 directly on our existing Zimbra, we plan to create a new VM, install Zimbra 6 to migrate the data before upgrading it to Zimbra 7.

We wanted to install Ubuntu 10 in the new VM but is concern if Zimbra 6 has any issue running on Ubuntu 10. What are the advantages of running Zimbra on Ubuntu 10 vs 8 beside 2 extended year of Long Term Support from Ubuntu?