Apply esc_html to response outputs. In the case that it's necessary to use HTML tags in the response message, wpcf7_form_response_output filter is available.
Don't use $_POST for internal data passing.
Generalized message for spam.
Check posted_data instead of $_POST
Introduce $contact_form->get_posted_data()
Check posted_data instead of $_POST
Revert. Those should wait until the next major update.
This $value could be an array.
Avoid possible XSS. $_SERVER['HTTP_USER_AGENT'] is not reliable.
It's not necessary to show Jetpack notice to users who didn't use to use older versions than 3.0.
Update POT and Japanese translation
Update jquery.form.js to 3.18.
Add 3.3.1 Change Log
ready for 3.3.1
German translation updated by Ivan Graf
Thai language translation updated by kazama.
Hungarian translation updated by Farkas Győző
Check if additional headers exist.
Irish translation created by Vikas Arora
Tagalog translation updated by Hanne