[Mixalis]

I stopped syncing with iCal because of frequent duplications and other errors which I put down to the sync process. I manually deleted all task data from iCal (not, of course, calendar information) and now avoid the iCal sync button. Since then I have had much greater data integrity within OF desktop. I can see no particular reason to continue syncing with iCal except, perhaps, for the iCal alarm function as mentioned by jdh.