I have published an article on “What’s new in Android 4.0” at my companies blog, Please follow this link to read on it http://www.e-consystems.com/blog/android/?p=491
Then what is a “Force Close Loop ”, exactly? The term is generally used to describe when an app is involuntary closed by the system, then it’s automatically launched again, and then closed, and this goes on and on. Since you can’t access any of Android’s menus while your phone is in a force close loop, there’s no obvious way to kill it.
Usualy this can be due to buggy application that you have installed recently.