Ok thats for that, I've removed it.. though I have 4 new issues;
1) How do you stop aliases being shown in the Gal now (4.5.x hide them fine)
2) I can't send email, it just gives the work in progress slow to respond message;
A network service error has occurred. msg: system failure: MessagingException
code: service.FAILURE
method: ZmCsfeCommand.prototype.invoke
detail: soap:Receiver
SOLVED as per
[SOLVED] Expired Cert in 5.0GA can cause mail Delivery failure
3) can't seem to receive now either (SOLVED as per above thread as well)
4) the "sort by From" field is now labeled as "step 3" (SOLVED as per
http://www.zimbra.com/forums/install...html#post71337)