iPhone <button> padding unchangeable?

Question

A HTML5 in Mobile Safari seems to have fixed, unchangeable left and right padding. Here\'s a demo plus how it looks in Safari 5 and iOS4.

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Answer 1

After messing around with the buttons for a week I dumped them and now I use div-s instead. If you add display: inline-block; to the div-button it can also be centered like a button.