The worst thing for me at the moment is that Zimbra doesn't remember the view settings. (Both the beta's and the production client).
When I load zimbra desktop, I always have to set the columns width first. My "From" is to small, I would like to see from whom the mail is. The left frame is always to small, I have a few subfolders and longer names for folders and i hate to see horizontal scrollbars. Then the screenposition, it always opens up at my primary monitor, while I closed it when it was on my secondary monitor.
Why doesn't zimbra remember these things? It's quite annoying to resize everything when it starts up.