Created attachment 128850 [details]
Please see the attached testcase. A keyboard-only user can read the text in the second frame, but not in the first one.
First impression :- It seems that webkit is not focusing on iframe if it contains a focusable element (text box in this case).
Will look into more details.
Page up and page down do work for me in Safari 5.1.3 on Mac, but plain up and down arrows don't.On a notebook keyboard, both Fn-arrows and Ctrl-arrows translate to page up and page down.
This seems largely intentional, because plain down arrow opens suggestion popup.
Behavior is the same in subframes as it is in main frame.
> This seems largely intentional, because plain down arrow opens suggestion
That's true if you take as a premise that the behavior mentioned in comment 1 (focusing the input, not the document itself) is correct.... That seems like a nontrivial assumption.
(In reply to comment #2)
> This seems largely intentional, because plain down arrow opens suggestion popup.
So should we keep the current behavior as is?