>>560
自分は
(substitute-key-definition 'list-buffers 'ibuffer ctl-x-map)

(aput 'ibuffer-saved-filter-groups
      "navi2ch"
      '(("navi2ch-article" (mode . navi2ch-article-mode))))

(add-hook 'ibuffer-mode-hook
          '(lambda ()
             (ibuffer-switch-to-saved-filter-groups "navi2ch")))
こんな感じにしてて、navi2chのバッファで埋め尽くされることだけは防いでる。