(Pulls soap box out from under his desk)
I honestly don't know why people don't heed our warnings.
We say: It's really not a good idea to hack your installation to work on another OS. . . and they do anyway..
We say: Make sure you backup before you do anything...and some don't.
We say: PLEASE don't run Zimbra Betas in a production environment. . and they do.
We don't just say these things to be jerks, but we say them because we really do know what's best for you. And it is not in your best interest to run RC2 in a production environment. Just look at the bugzilla! Do a search for all 5.0 bugs.
Just two nights ago we discovered that some ldap entries aren't migrated. We've found issues, and we're fixing them

We just don't want
anyone to ever have to post a horror story about how they lost their data. It's that simple.
The fact is, this is a HUGE release for us with a lot of new featres, and we want people to test it. . but
not at the cost of their data. It's just not worth the risk.
I've been there. I've wiped data doing this very same thing (before I worked at Zimbra) and almost got arrested. We do it so you don't have to.
It's that simple.
Not worth the risk.
Still on target for Dec.
(Climbs down from soap box)
All the Best,
john