This is probably a dumb Android bug, but I noticed this morning that, editing a reply to a posting, on my Android tablet, I was unable to delete an emoticon in the quoted message. Neither positioning the cursor to backspace-delete, not selecting the emoticon in a blue select region and deleting, seem to work. Instead, it's the character before the emoticon that disappears. No such problem with desktop browsers, so it's probably an Android bug, but these things need to be reported...