So, have you actually:
a) logged on as different users with varying mailbox sizes

b) using different browsers

c) on different LAN computers
and recorded and analysed the results to look for anomalies?
The information you're giving us to go on at the moment is a bit vague :)

You can do that in one line by running:zmmailbox -z -m user1@domain s -t message in:junkwhich means you can use standard redirection to send it to a file:zmmailbox -z -m user1@domain s -t message in:junk > /tmp/junk-search.txtRun zmmailbox --help for other command-line switches or see Zmmailbox - Zi...

$recip = 'marcie@titletownrelocation.com' . ', '; $recip .= 'jason@idistillery.com'; $recip .= 'service@eratitletown.com'; Should there be another comma in the second line to separate the last two addresses?If not are you able to get the error reurned from the mail() ...

If I understand the way Linux handles filesystems correctly; I think you can do this: Add your new disk Create filesystem and format with appropriate filesystem (eg ext3) Create temporary mount point for new disk (eg /mnt/newdisk), and mount Rysnc (to retain permissions) your /opt/zimbra to /mnt/new...

I would try logging on as various different users on the same computer and on different browsers. Record your results (load times) so you can compare and hopefully eliminate the user/browser/computer.

You're post doesn't make much sense as just a list of bullet points. Perhaps you could answer some of your points yourself if you check the main Zimbra website for things like Server features, Demos, Product editions, Mobility etc.Failing that, have a search on these forums for specific ques...

Indeed. At the beginning of the year, Zimbra says CentOS is NOT supported: Personally">http://www.zimbra.com/forums/announcements/14116-centos-not-supported.htmlPersonally I would use Ubuntu LTS. It's fast, has great software repositories, commercially supported by Ubuntu/Canonical, and sup...

Just to be clear.. on your 'other machine' - which browser? And does it work or does it have the same error?

You probably replied before seeing my above edit, but could you outline in detail the steps you take to reproduce each error that you receive in Firebug and what the outcome is (does it get shared, do the invitation emails get sent etc?)

I logged in, shared a Calendar, and did not receive any errors.
ZCS FOSS 5.0.7 on Ubuntu 6.06.2 LTS 64bit
Could you outline, in detail, the steps you take to reproduce each error that you receive in Firebug?

zcs-sharecal-noerr.jpg