I just installed the latest update, and it has really messed my game up. (This is for iOS.) Immediately after opening the updated game, I got a big warning message that my game is out of sync on the iCloud and on my device. It said the iCloud version was more current, so I selected to load that. I had to click that selection 20-30 times before it did anything, I restarted several times, and when it finally loaded, it showed that I still needed to complete one gig that I finished last night, and it showed that I failed several others that I had gotten 5 stars on over the last couple of days. Ok, not great, but not terrible. But then....
I noticed my friends list was completely empty, and it kept telling me I needed to log into GC (even though I was logged I ) so I restarted several more times, and the friends list finally came back. But...all of my relationships are at zero, which also means my spouse is gone. I'm not happy.
I've been playing this game for a long time, I'm at level 33, so it's not like doing updates is new to me. My guess is that there's something wrong with the update, so proceed with caution.