iCal not syncing with caldav account
About 4 weeks ago, the iCal stopped syncing the primary account with the kerio server. It also doesn't sync one of the delegated accounts, but syncs just fine with another delegate.
I don't believe it to be a kerio problem because my iphone syncs just fine with the server, and the web interface is also just fine - that's what I've been using until I can get iCal to work again, but I have successfully used iCal for months prior to this problem.
I have removed the account from iCal, added it back in and I've also deleted the iCal plist, which has had no effect on the problem.
Any ideas?
many, Mac OS X (10.5.5)