Maybe your Fruit Ninja scores suck. But if you're an iPhone 5 owner, you may finally be able to blame the hardware instead of your clumsy finger swipes. An alleged glitch is appearing on the iPhone 5 and fifth-gen iPod Touch, where extremely quick, diagonal gestures are not registering correctly with the device.
First noticed by developer CMA Megacorp, rapid multiple swipes diagonally across the iPhone 5 screen may not register with the touch screen. Not to say that the screen doesn't scroll at all, necessarily. Sometimes the frantic movements will scroll the screen intermittently; other times the iPhone 5 doesn't seem to register the movement whatsoever.
Check out this video from Recombu for a more visual explanation.
You might initially ask yourself, "why would I attack my iPhone 5 screen like a spastic 4th-grader?" But think about apps that actually require the user to make quick, successive swipes. Fruit Ninja immediately comes to mind, as do other twitch-based games.
The issue does not seem to show up on the iPhone 4 or iPhone 4S, and considering the difference in display technology, the in-cell touch sensors of the iPhone 5 may be the culprit. Normal, vertical scrolling still works fine, as do horizontal swipes.
Essentially, this issue won't present a major problem for developers outside of games that require you to go rapid-fire on those diagonal swipes. A small group, but an apparent hardware glitch all the same.
I thought I was crazy, but it happens to me that with the iPhone 5 I sometimes have trouble turning on or off the WiFi and the Bluetooth buttons. Maybe I'm not that crazy after all.