Steps to reproduce:
1. Fill a text field with lots of text (more than twice its width for greatest effect).
2. Move to the end of the text, then put the cursor at the beginning of the visible text.
3. Type a letter.
Result (latest WebKit)
The letter is typed, and the cursor is moved as far to the right as possible of the text field (the text follows).
Expected result (latest Safari)
The letter is typed, but the cursor only moves right to accomodate for the newly typed letter.
I can no longer reproduce this. Can anyone confirm?
(In reply to comment #2)
> I can no longer reproduce this. Can anyone confirm?
I verified that r17543, changing text controls from flexbox to RenderBlock, fixed this.
I can also no longer reproduce this.