I know there are a lot of threads abou this. The crazy thing about my situation is that I've tested a 3GS, a 4S and an iPad1, and it consistently happens only on the iPad1. It happens at launch. The app continues to run. However, the first time I open an MBProgressHUD, when I go to dismiss it, it doesn't dismiss, and therefore my app becomes unresponsive at that point.
Please let me know what could causing this, and why it only happens on the iPad.