Yes, The Simpsons: Tapped Out was also affected.
However, they were able to provide an update 5 days later.
I think if there was no solution they would eventually announce that they would be discontinuing service for the iPhone 4.
ask “The Simpsons” company what they changed!!! can’t be that hard to find it out and fix it!!! 
I also have the Simpsons Tapped Out which had the same problem but a patch was released in just a few days! they even kept constant updates on their forum. Now that’s great customer service! When was the last time there was any mention of this problem on these forums by D3??? All I know is if this ever gets fixed I’m no longer wasting money on this game, these guys don’t deserve it.
I just got a notification than an update for the iPhone 4 is available