I confirm that upgrade from 0.3.1-4 to 0.3.1-5 override /usr/share/roundcube/.htaccess
diff /usr/share/roundcube/.htaccess /backup/rc_htaccess 9,10c9,10 < php_value upload_max_filesize 5M < php_value post_max_size 6M --- > php_value upload_max_filesize 20M > php_value post_max_size 21M