/usr/share/popfile/skins/default/ is in popfile 1.1.3+dfsg-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/popfile/skins/default/advanced-page.thtml
/usr/share/popfile/skins/default/bar-chart-widget.thtml
/usr/share/popfile/skins/default/bucket-page.thtml
/usr/share/popfile/skins/default/common-bottom.thtml
/usr/share/popfile/skins/default/common-javascript.thtml
/usr/share/popfile/skins/default/common-middle.thtml
/usr/share/popfile/skins/default/common-top.thtml
/usr/share/popfile/skins/default/configuration-page.thtml
/usr/share/popfile/skins/default/corpus-page.thtml
/usr/share/popfile/skins/default/history-javascript.thtml
/usr/share/popfile/skins/default/history-navigator-widget.thtml
/usr/share/popfile/skins/default/history-page.thtml
/usr/share/popfile/skins/default/history-search-filter-widget.thtml
/usr/share/popfile/skins/default/imap-bucket-folders.thtml
/usr/share/popfile/skins/default/imap-connection-details.thtml
/usr/share/popfile/skins/default/imap-options.thtml
/usr/share/popfile/skins/default/imap-update-mailbox-list.thtml
/usr/share/popfile/skins/default/imap-watch-folders.thtml
/usr/share/popfile/skins/default/imap-watch-more-folders.thtml
/usr/share/popfile/skins/default/magnet-navigator.thtml
/usr/share/popfile/skins/default/magnet-page.thtml
/usr/share/popfile/skins/default/magnet.png
/usr/share/popfile/skins/default/nntp-force-fork.thtml
/usr/share/popfile/skins/default/nntp-port.thtml
/usr/share/popfile/skins/default/nntp-security-local.thtml
/usr/share/popfile/skins/default/nntp-separator.thtml
/usr/share/popfile/skins/default/password-page.thtml
/usr/share/popfile/skins/default/pop3-chain-panel.thtml
/usr/share/popfile/skins/default/pop3-configuration-panel.thtml
/usr/share/popfile/skins/default/pop3-security-panel.thtml
/usr/share/popfile/skins/default/security-page.thtml
/usr/share/popfile/skins/default/session-page.thtml
/usr/share/popfile/skins/default/shutdown-page.thtml
/usr/share/popfile/skins/default/smtp-chain-server-port.thtml
/usr/share/popfile/skins/default/smtp-chain-server.thtml
/usr/share/popfile/skins/default/smtp-configuration.thtml
/usr/share/popfile/skins/default/smtp-security-local.thtml
/usr/share/popfile/skins/default/socks-widget.thtml
/usr/share/popfile/skins/default/style.css
/usr/share/popfile/skins/default/view-page.thtml
/usr/share/popfile/skins/default/view-quickmagnets-widget.thtml
/usr/share/popfile/skins/default/view-scores-widget.thtml
/usr/share/popfile/skins/default/windows-configuration.thtml
/usr/share/popfile/skins/default/xmlrpc-local.thtml
/usr/share/popfile/skins/default/xmlrpc-port.thtml