Created attachment 34613 [details] Html with >65k input field Safari and Chrome incorrectly render text fields that have more than 65,535 characters. Only the first (length mod 2^16) characters are rendered and are editable. However, when there are 2^16 or more characters in a text field, they are all properly sent to the server on submit. The attached test case demonstrates this problem.
See also bug 29636 (probably same root cause).