I am using Zimbra since years and use the search function extensivly. The advanced search through the menu doesnot work as well. The quotes where made my zimbra advances search, not by me.
A somle search from: tanzer leads to:
I restarted zimbra and tried again:
msg: system failure: Caught null
query: "from: tanzer",
name: "ZimbraWebClient - FF3.0 (Linux)",
No errors, the GUI shows the normal mailbox.
in:inbox from: tanzer