This one should be filed under the WTF category. Apparently, clicking/tapping on HTML <label> in current versions (5.0 or older) of iOS Mobile Safari does not focus the corresponding form element. Not sure if this a bug or done intentionally, but not only is it annoying, but also an accessibility issue.

There is a simple CSS “fix” for this, and it is seems to work pretty well across all form elements:

1

label { cursor: pointer; }

Yeah, that’s it. Go figure.