emacs 24.4.50.1 emacsの設定を一からやり直してからか、 マルチバイト文字を入力した時に、 以下のようなエラーが表示されるようになってしまっていた。 These default coding systems were tried to encode text in the buffer `AppVideoSuggestHint.pm': (undecided-unix (482 . 12354)) However, each of them encountered characters it couldn't encode: undecided-unix cannot encode these: ¤¢ Click on a character (or switch to this window by `C-x o' and select the characters by