/usr/share/roundcube/plugins/markasjunk2/ is in roundcube-plugins-extra 0.7-20120110.
This file is owned by root:root, with mode 0o755.
..
/usr/share/roundcube/plugins/markasjunk2/config.inc.php
/usr/share/roundcube/plugins/markasjunk2/config.inc.php.dist
/usr/share/roundcube/plugins/markasjunk2/drivers/
/usr/share/roundcube/plugins/markasjunk2/drivers/cmd_learn.php
/usr/share/roundcube/plugins/markasjunk2/drivers/dir_learn.php
/usr/share/roundcube/plugins/markasjunk2/drivers/email_learn.php
/usr/share/roundcube/plugins/markasjunk2/drivers/sa_blacklist.php
/usr/share/roundcube/plugins/markasjunk2/drivers/sa_detach.php
/usr/share/roundcube/plugins/markasjunk2/localization/
/usr/share/roundcube/plugins/markasjunk2/localization/ca_ES.inc
/usr/share/roundcube/plugins/markasjunk2/localization/cs_CZ.inc
/usr/share/roundcube/plugins/markasjunk2/localization/de_CH.inc
/usr/share/roundcube/plugins/markasjunk2/localization/de_DE.inc
/usr/share/roundcube/plugins/markasjunk2/localization/en_GB.inc
/usr/share/roundcube/plugins/markasjunk2/localization/en_US.inc
/usr/share/roundcube/plugins/markasjunk2/localization/es_AR.inc
/usr/share/roundcube/plugins/markasjunk2/localization/es_ES.inc
/usr/share/roundcube/plugins/markasjunk2/localization/fa.inc
/usr/share/roundcube/plugins/markasjunk2/localization/fr_FR.inc
/usr/share/roundcube/plugins/markasjunk2/localization/gl_ES.inc
/usr/share/roundcube/plugins/markasjunk2/localization/hu_HU.inc
/usr/share/roundcube/plugins/markasjunk2/localization/it_IT.inc
/usr/share/roundcube/plugins/markasjunk2/localization/nl_NL.inc
/usr/share/roundcube/plugins/markasjunk2/localization/pl_PL.inc
/usr/share/roundcube/plugins/markasjunk2/localization/pt_BR.inc
/usr/share/roundcube/plugins/markasjunk2/localization/ro_RO.inc
/usr/share/roundcube/plugins/markasjunk2/localization/ru_RU.inc
/usr/share/roundcube/plugins/markasjunk2/localization/tr_TR.inc
/usr/share/roundcube/plugins/markasjunk2/localization/zh_TW.inc
/usr/share/roundcube/plugins/markasjunk2/markasjunk2.js
/usr/share/roundcube/plugins/markasjunk2/markasjunk2.php
/usr/share/roundcube/plugins/markasjunk2/package.xml
/usr/share/roundcube/plugins/markasjunk2/skins/
/usr/share/roundcube/plugins/markasjunk2/skins/default/
/usr/share/roundcube/plugins/markasjunk2/skins/default/ie6hacks.css
/usr/share/roundcube/plugins/markasjunk2/skins/default/mail_toolbar.gif
/usr/share/roundcube/plugins/markasjunk2/skins/default/mail_toolbar.png
/usr/share/roundcube/plugins/markasjunk2/skins/default/markasjunk2.css
/usr/share/roundcube/plugins/markasjunk2/skins/default/messageactions.gif
/usr/share/roundcube/plugins/markasjunk2/skins/default/messageactions.png