I am thinking about installing Zimbra, but I am unsure about versions. ZCS 3.0 is scheduled to be released in a month or two. Normally I would just install the present stable release, and upgrade as things are released. But this concerned me on the download page:

Warning: If you are already running Zimbra's Milestone 1 (M1) beta release, To install M2 you will need to uninstall M1 first, which means a loss of data (messages, appointments, and contacts).
So, if I install the present release, will I have problems upgrading (losing data) when the time comes?

A similar question applies to Fedora core 4--it is in beta now. Is there a targeted release date ? (I know that really *should* go in anther thread!)

Many thanks