Ok, I've read through various threads and haven't had any luck solving my issue. I am running 10.5.6 on my Intel MacBookPro and I get the "Couldn't access Yahoo! Zimbra Desktop server" error upon launching Zimbra Desktop. During installation, I also got the "Failed to inject zimlets" error.
I have attached my zdesktop.out (no zdesktop.log file is present or I would have attached that as well). For reference, I do have a computer name in the sharing preferences and web sharing is turned on. I may have a problem with localhost resolving 127.0.0.1 but frankly, I'm not sure how to check on that or fix it. Any suggestions would be greatly appreciated. Thanks.