I noticed yesterday that a lot of the events I had set up in my iCal have disappeared. I thought maybe it was an iCloud synch problem, but in checking a little bit, all of the calendars that I have set up are set to snych with iCloud.
This is very distressing as I had important dates in there such as tax payments, flilght information, show/concert dates. I'm about to go on a 3 week international trip and I can't afford to have my information disappearing.
I Had the same problem (annoying). Simple fix for me. Go to settings- check Calendar settings- sync events- all events. Somehow my sync settings went to just this week and all my other events were in limbo. Once I went to sync all events my previously stored events reappeared.