
If you do not have perfect 3g connection, you will find yourself in the same boat as me. Time and time again, I will get home from work, login to FarmVille, and see that not a single crop has been harvested from the morning. After being burned several times, I now harvest and replant my crops, manually shutdown the app, restart the app, and see if the changes actually took effect or if I have to attempt to do it all over again.
The only silver lining, is that when it works, its the only Zynga app that actually connects to your Facebook FarmVille farm, instead of creating a new one that only lives on your Phone.