[scaphandre]

Ha - I agree that that procedure seems preposterous. I have seen it listed in several forums, and only considered it after several others had reported success. I figured it didn't cost much to empirically give it a go. I present weak evidence that it appears it may have helped for me.

For what its worth, I am doubtful. There did appear to be some subjective improvement in responsiveness, but I didn't benchmark it. It is not the Calculator app in itself that functions as this, I had originally read any stock Apple app would do it.

Software reset does fix this for some, so I don't think that some button state polling problem relating to software is inconceivable. Possible, but unlikely.

More info here - they acknowledge it is likely bs. http://lifehacker.com/5909709/recalibrate-your-idevice-home-...