We are zimbra to approximately 200 users. All work perfectly in Firefoz and Chrome with Windows 7.
But we have some computers with Windows 8.1 Chrome and Firefox. In this case only works in Firefox. In chrome I can enter the email appears the list of folders, but the message pane is gray and will not appear messages.
All accesses are being made in AJAX mode.
Chrome version: 38.0.2125.104 m