Earlier I was carrying my ipad and when I looked at it the screen was magnified about 10 times. This made it impossible to use and difficult to even log into (I have the security code feature enabled). I must have squeezed the ipad somehow to cause this, and it took quite a long time of aimless tapping before it finally reverted to the normal display. There doesn't seem to be anything in Settings to change this, and doing a reboot didn't help. Has anyone else ever had this problem and is there a way of avoiding/curing it?