mikutter

「イニシャルD」で検索すると出てくる以下のようなツイート
https://twitter.com/michi_fuk/status/482752741001805825
https://twitter.com/u0a7tmok/status/482700559586033664
https://twitter.com/sanshou_shinjou/status/482697459924103168
https://twitter.com/KINGSILVIA15/status/482660290991906817
で、

• ツイート中に含まれる「"D " + 半角文字」が一つ前の文字からリンク表示になる
• そのリンクをクリックすると mikutter が落ちる

という現象が発生しています。

落ちた時のデバッグ出力は以下の通り:

notice: {MIKUTTER_DIR}/core/plugin/gtk/gtk.rb:409:in `block (2 levels) in <top (required)>': activate by toolkit. ignore.
notice: {MIKUTTER_DIR}/core/plugin/gtk/gtk.rb:409:in `block (2 levels) in <top (required)>': activate by toolkit. ignore.
notice: {MIKUTTER_DIR}/core/plugin/gtk/gtk.rb:409:in `block (2 levels) in <top (required)>': activate by toolkit. ignore.
/usr/pkg/share/mikutter/core/plugin/profile/profile.rb:10:in `block (2 levels) in <top (required)>': undefined method `[]' for nil:NilClass
         from /usr/pkg/share/mikutter/core/mui/cairo_miracle_painter.rb:152:in `call'
         from /usr/pkg/share/mikutter/core/mui/cairo_miracle_painter.rb:152:in `clicked'
         from /usr/pkg/share/mikutter/core/lib/uithreadonly.rb:22:in `block (2 levels) in singleton class'
         from /usr/pkg/share/mikutter/core/mui/cairo_cell_renderer_message.rb:163:in `block in event_hooks'
         from /usr/pkg/share/mikutter/core/mui/gtk_extension.rb:33:in `call'
         from /usr/pkg/share/mikutter/core/mui/gtk_extension.rb:33:in `block in safety_signal_connect'
         from /usr/pkg/share/mikutter/core/mui/cairo_cell_renderer_message.rb:98:in `call'
         from /usr/pkg/share/mikutter/core/mui/cairo_cell_renderer_message.rb:98:in `signal_emit'
         from /usr/pkg/share/mikutter/core/mui/cairo_cell_renderer_message.rb:98:in `block in tree='
         from /usr/pkg/share/mikutter/core/mui/gtk_extension.rb:33:in `call'
         from /usr/pkg/share/mikutter/core/mui/gtk_extension.rb:33:in `block in safety_signal_connect'
         from /usr/pkg/share/mikutter/core/plugin/gtk/mainloop.rb:10:in `call'
         from /usr/pkg/share/mikutter/core/plugin/gtk/mainloop.rb:10:in `main'
         from /usr/pkg/share/mikutter/core/plugin/gtk/mainloop.rb:10:in `mainloop'
         from /usr/pkg/share/mikutter/mikutter.rb:63:in `boot!'
         from /usr/pkg/share/mikutter/mikutter.rb:92:in `<main>'
/usr/pkg/lib/ruby/vendor_ruby/2.0.0/glib2.rb:31:in `exit': exit
         from /usr/pkg/lib/ruby/vendor_ruby/2.0.0/glib2.rb:31:in `exit_application'
         from /usr/pkg/share/mikutter/core/mui/cairo_cell_renderer_message.rb:98:in `signal_emit'
         from /usr/pkg/share/mikutter/core/mui/cairo_cell_renderer_message.rb:98:in `block in tree='
         from /usr/pkg/share/mikutter/core/mui/gtk_extension.rb:33:in `call'
         from /usr/pkg/share/mikutter/core/mui/gtk_extension.rb:33:in `block in safety_signal_connect'
         from /usr/pkg/share/mikutter/core/plugin/gtk/mainloop.rb:10:in `call'
         from /usr/pkg/share/mikutter/core/plugin/gtk/mainloop.rb:10:in `main'
         from /usr/pkg/share/mikutter/core/plugin/gtk/mainloop.rb:10:in `mainloop'
         from /usr/pkg/share/mikutter/mikutter.rb:63:in `boot!'
         from /usr/pkg/share/mikutter/mikutter.rb:92:in `<main>'
notice: {MIKUTTER_DIR}/mikutter.rb:69:in `rescue in boot!': catch exception `SystemExit'
notice: {MIKUTTER_DIR}/mikutter.rb:71:in `rescue in boot!': => `SystemExit'
notice: {MIKUTTER_DIR}/mikutter.rb:96:in `rescue in <main>': catch SystemExit

DはDM関連だと思いますが、表示動作仕様としてはどういう意図なんでしょうか。