My Maxis set encountered a problem yesterday too. After playing with a racing car game, I went to the menu in the middle of the game by pressing the Home button to go back to the menu, it halted for awhile and even on Home screen, the sound of the game still can be heard for 2 seconds before it was ended.

Then after that, I can't launched any AppStore installed programs at all. Every single pgm I call up, goes back to Home screen. They crash!!!!Then I search the web, apparently this is a common problem for iPhone and iPod Touch after iTunes 7.7.1 is launched!

The fix was rather easy tho, install a new program and run it. Then all the other existing applictations are working again. But don't be to happy so soon, it happened again after I sync with iTunes. *haiyooo....*

Well, at least there's a stupid solution now. Anyone encountered this before?

I don't think this is only happening to Maxis set but all other iPhones as a whole, prolly the version 2.xx above or like mentioned, 7,7.1 and above is buggy. Nontheless, I love it, it's a great piece of toy to play with.