Welcome to the Archived, Readonly Zimbra Collaboration forums. Here’s the place where we talked about all things related to Zimbra email products. Registrations and postings are disabled here.
Be sure to visit https://www.zimbra.com/forums to start new discussions and to find the latest answers to questions being asked.
Come and get it;
For more information on what's new in Desktop there is a great UI changes PDF to browse:
ZD 7 UI updates
Please be sure to review the FAQ, Release notes and Install Guides which are all available on the Download page.
Any ETA when a 64bit build will be available that includes default mailto: support under Linux ?
Right now (assuming you are asking for bug below) this is slated for Zimbra 8: https://bugzilla.zimbra.com/show_bug.cgi?id=58363