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One thing my girlfriend does that I've never understood - she can use my iPhone or iPad expertly (she's even figured a few things out on her own that I didn't know, like unpinch-to-fullscreen video on the iPad). Yet for the longest time, she would always double-click the home button on my iPhone to quit the app, then turn it off.

Because I had double-click-home set to the camera, this meant that every other time I started my iPhone, it was in the camera app, which was really confusing a lot of the time. Once I started installing the iOS4 betas, though, and double-click-home became 'reveal task switcher', her double-triple-quintuple clicking the home button did nothing but show and hide a row of icons.

After the first time she did that and I made fun of her, she learned pretty quick. Still, this sort of thing happens to the smartest/most capable/most educated people. It's not just mom and dad.

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