CKS Version 2.0; iOS 7
Still having the issue of being attacked while I'm attacking someone else. Around that same time my 'collect' diamonds function is not adding diamonds to my safe and "All-Time Leaderboard" statistics do not match between the PVP tab and the Social tab.
This happened earlier today as well. Restarting the game fixes the issue for a few hours, but you never really know when the game stops working properly until you see the social log show 'defense lost' or after you realize you lost your diamond collection fund by trying to collect them.
iPhone 4, usually.