First a bit of background for those who aren't familiar: Just a few weeks ago Samsung released their ICS build of TouchWiz, and my phone (a Samsung Galaxy SII) updated over the air. Ever since none of my calendars have synced. It turns out there's a bug wherein recurring events that were present before the update (I think it's only them?) can cause calendars to stop syncing. (I've searched in vain for a concise link to the problem to reference... )
I've tried factory resetting to no avail and I've tried deleting all my extraneous calendars and the recurring events I could find, but sync still doesn't want to work. Is there any way that I can track down which events are causing the trouble more precisely?