I have tried set up imap4 account in zimbra desktop beta2, as well as in previous versions, on intel mac (Leopard).
I think I've set up it correctly, because it downloaded folder names from the server.
But it can not find any mail. I have 'No results found'.
Some folders - I see initially "This Folder is currently not syncing. Click here to sync this folder" changing immediately to "No resultl found" after click.
Mail server I'm using is dovecot, standard installation, using Mailfolders (if it's matter).
The same server works perfectly with thunderbird, apple mail, and on linux with all clients I've tried. Zimbra desktop is the first one to have problems with it.

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Sergey Ivanov.