When I play Plants vs. Zombies on especially chaotic levels, the sound effects eventually go away. They never come back unless I force quit the app and relaunch. This specific issue has been confirmed by another iPad 2 user. My kids tell me they've seen the issue on my wife's iPad 1. I have never seen this problem on any other game. However, PopCap told me today: So I'm asking a broader question: have you seen or heard about an issue like this "regarding many Apps and games by various companies"? Is anyone aware of a support interaction with Apple concerning this topic?