I have an ipad2 (one year old) and never had this problem before. When I am in a program, happily doing what I want, the ipad screen goes black and a second later changes back to the home screen. Today I have been working in Pages and it has done this at least 10 times. My daughter also has this problem sometimes with her ipad and also my son, with his iPod. The only thing we can think of is that it has happened since we upgraded to IOS6.
Can anyone shed some light on why it happens and what to do to stop it?