I have a second generation itouch an sometimes in Safari or if I am in an app like NY Times, it will shut down. Not turn off, but close the app. I went to Best Buy (where I bought it) and was told to hold down the button at the bottom to close apps when I am done. He said that I had too many programs running in the background. The weird thing is, that I took my itouch back at least 4 times, sometimes to different Best Buys, and each product did the same thing.