I installed Zimbra on May 22, 2010 and it's been up and down due to installing on VirtualBox and then moving to hardware later, but over that time I have received
14,916,047 times in /opt/zimbra/log/httpd_error.log.
[error] (88)Socket operation on non-socket: apr_socket_accept: (client socket)
Not that I can't truncate the file regularly, I'd much rather not have this message.
-rw-r----- 1 zimbra zimbra 1581435635 2010-06-02 08:48 httpd_error.log
This is an install of the latest bits as of May 22, 2010.