icloud has stopped syncing with phone
Since yesterday, and without me changing any settings, my iCal and iCloud have stopped syncing with my iPhone calendar. Both ways round - ie. an entry into iCal or iCloud won't show on my phone, and an entry on my phone won't show in my iCal or iCloud. This morning, iCal suddenly was giving me an error message because it wouldn't recognise my Google calDAV password, but I have sorted that now. I've also tried turning various settings off and on, deleting my calendar off my phone and installing it again, etc, but nothing seems to make a difference. Any ideas?
iPhone 3GS, iOS 6