The following shows a command line session with lsattr command which helps in listing file attributes.
$lsattr -------------e-- ./(2561).jpg -------------e-- ./(1596).jpg -------------e-- ./(2551).jpg -------------e-- ./(2157).jpg -------------e-- ./(2053).jpg -------------e-- ./(1793).jpg -------------e-- ./(1917).jpg -------------e-- ./shortlisted -------------e-- ./(1722).jpg -------------e-- ./(1881).jpg -------------e-- ./(1654).jpg $lsattr /home/jeffrin/.bash_history -------------e-- /home/jeffrin/.bash_history $lsattr /home/jeffrin/.gnome2 -------------e-- /home/jeffrin/.gnome2/keyrings -------------e-- /home/jeffrin/.gnome2/accels $lsattr /home/jeffrin/.m .mission-control/ .mplayer/ .muttrc .muttrc-personal .mozilla/ .muttdebug0 .muttrc~ $lsattr /home/jeffrin/.mozilla/ -------------e-- /home/jeffrin/.mozilla/firefox -------------e-- /home/jeffrin/.mozilla/extensions $lsattr /home/jeffrin/.muttrc -------------e-- /home/jeffrin/.muttrc $lsattr /home/jeffrin/.mission-control/ -------------e-- /home/jeffrin/.mission-control/accounts $lsattr /home/jeffrin/beautifulwork.org-git/ -------------e-- /home/jeffrin/beautifulwork.org-git/beautifulwork $lsattr /home/jeffrin/beautifulwork.org-git/beautifulwork/ -------------e-- /home/jeffrin/beautifulwork.org-git/beautifulwork/wp-includes -------------e-- /home/jeffrin/beautifulwork.org-git/beautifulwork/wp-blog-header.php -------------e-- /home/jeffrin/beautifulwork.org-git/beautifulwork/perl-testing.pl -------------e-- /home/jeffrin/beautifulwork.org-git/beautifulwork/wp-admin -------------e-- /home/jeffrin/beautifulwork.org-git/beautifulwork/wp-trackback.php -------------e-- /home/jeffrin/beautifulwork.org-git/beautifulwork/README.md -------------e-- /home/jeffrin/beautifulwork.org-git/beautifulwork/index.php -------------e-- /home/jeffrin/beautifulwork.org-git/beautifulwork/wp-cron.php -------------e-- /home/jeffrin/beautifulwork.org-git/beautifulwork/wp-links-opml.php -------------e-- /home/jeffrin/beautifulwork.org-git/beautifulwork/wp-comments-post.php -------------e-- /home/jeffrin/beautifulwork.org-git/beautifulwork/wp-load.php -------------e-- /home/jeffrin/beautifulwork.org-git/beautifulwork/Mail -------------e-- /home/jeffrin/beautifulwork.org-git/beautifulwork/wp-activate.php -------------e-- /home/jeffrin/beautifulwork.org-git/beautifulwork/wp-signup.php -------------e-- /home/jeffrin/beautifulwork.org-git/beautifulwork/wp-login.php -------------e-- /home/jeffrin/beautifulwork.org-git/beautifulwork/xmlrpc.php -------------e-- /home/jeffrin/beautifulwork.org-git/beautifulwork/wp-config-sample.php -------------e-- /home/jeffrin/beautifulwork.org-git/beautifulwork/wp-mail.php -------------e-- /home/jeffrin/beautifulwork.org-git/beautifulwork/beautifulwork-charts.php -------------e-- /home/jeffrin/beautifulwork.org-git/beautifulwork/wp-settings.php -------------e-- /home/jeffrin/beautifulwork.org-git/beautifulwork/wp-content -------------e-- /home/jeffrin/beautifulwork.org-git/beautifulwork/readme.html $
The 'e' attribute indicates that the file is using extents for mapping the blocks on disk. It may not be removed using chattr.