I planted wheat on my 3rd and 4th farms last night, after the latest update. As I planted my fields changed from the normal plowed field to green grass background. I was charged for both the seed and fuel and received the experience points. Not sure what the problem is as my wife can see the planted areas. Here is a link to my farm 3:
http://apps.facebook.com/farmtown/?ref=bookmarks&cid=bm