Please stop complaining and do as we do
Please let them work out the problems.
Do as we do:
Look at the dates at the pm-page and add an extra 2 month to it. Our experience is that if you do that you don't get frustrated or disappointed by the Zimbra team.
It's great work they're doing and I'dd rather wait a little longer than having to explain to my users/customers that the bug is just a known bug that they didn't want to remove cause of a set release date (like M$ is doing).
Keep up the splendid job you Zimbra dudes :D