After replacing my hard drive and re-installing Tiger on my machine, I discovered that iCal was no longer able to publish my calendars to my web server -- I have a Linux web server running Apache and WebDAV for a certain directory tree, on an SSL-enabled web site.
The error message was so helpful:
Publish failed for calendar "blah"The log file on the web server didn't show any successful connection. However, a little bit of work with Ethereal (a free packet sniffer) revealed that iCal was indeed connecting to the server, but the SSL negotiations were failing.
Unexpected secure name resolution error (code -9812). The server name secure.domain.xyz may be incorrect.
Mac OS X Hints
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