Button of IPhone 4 Intermittent on IOS 5.1

Hello all,
Just upgraded my IPhone 4 to IOS 5.1. Since then, the home button sometimes does not work. Since I`ve never had a problem with my phone, and no new apps were added, it looks like a software glitch to me.
Quite annoying behaviour, huh? Any experience on this one, please?

Thanks for sharing...
David, not sure if downgrading is an option either... and I`ll call Apple tech sup in the first opportunity.
And Chad, thank God, my phone is not slow...
BUT I saw another post in this forum about "resetting" the home button (below). Not sure if it`s a valid reset, but since then my phone seems ok. I`ll try it out for a couple of days more, and let you know. Anyways, if you do this procedure (it`s quite simple and harmless, so I think you should) please observe if your phone flashes a white screen (very fast) after step 5...
I`ll keep you posted.
scowol
Re: The home button on the bottom is not working
Sep 18, 2011 12:33 AM (in response to jessicafromlynn)
1. Go to Settings and turn on the "passcode lock". Select the option to lock immediately with any combination of your choosing.
2. Open any application.
3. Press the power button to lock your phone.
4. Press the power button to unlock.
5. Before entering your combination/lock code, press "Emergency Call" and then tap the bottom left arrow to go back. (Don't fret - this won't dial an emergency number.)
6. Now, enter your passcode.
7. Your Home button will be recalibrated and function normally.

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