As most of you have likely noticed by now, the compose\reply\forward page for mobmails has been cleaned up a significant amount.

When replying or forwarding a message the previous messages are no longer put in the editor, instead they are displayed below the editor. This makes composing new messages quite a bit easier, especially for those who do not use the WYSIWYG editor. If you uncheck "Append to message" check box, the previous messages will not be added to the message you are writing.