Ubuntu 7.04, Evolution 2.10.1 and the user contributed connector (thanks esoleyman) against a 4.54 OSS Zimbra.
This appears to work for the downloading of contacts/calendar but not for the sync back up to the server. Also the same issues of not working with anything other than port 80 on the receiving options SOAP config.
I havent dug deep yet, but I will try against a full cert and see if it occurs there. Thanks for the work on it, a good start, relatively clean of crashes, although with a large mailbox it can crash out.