Many players are reporting that their accounts were rolled back to a earlier point in time. The screen shot below is from a player who lost about a weeks worth of stuff. If you are one of the affected and worked on any events, those too have been reset. Hopefully Zynga will do something about this during the maintenance today. For those who aren't VIP and don't spend any money, there is no way to report it other than posting on the forums. I suggest players post their issues on the forums. Go here and click on the red 'Get Help' link.