I have upgraded to Tiger on both of my computers. Originally I had 10.3.9 on my PowerBook which synced using .mac. When I bought a new iMac with Tiger preinstalled, iCal refused to sync with my .mac account (only iCal Events and ToDos). I have now done an Erase and Install on my PB and I get the same problem. I get an error message saying: *** -[NSNull timeZone]: selector not recognized [self = 0xa0727218] and it refuses to get any data from .mac. So at the moment I can't see my calendars, so I don't know what state they are in. I have searched Apple Support and there is nothing on the above error. So at the moment I am without my diary. I have tried delete pref and calendars and resyncing but get the same message all the time. Anyone else have this problem? If anyone can help, I would greatly appreciate it, I am lost without it.