I use: Kloxo-MR 6.5.1.b-2014041501
To reproduce -> go to client home -> consume it's desktop -> then try to remove one of his domain.
Already found another one:
Fatal error: Call to undefined method domain::getFullDocRoot() in /usr/local/lxlabs/kloxo/httpdocs/driver/ftp/ftpuserlib.php on line 28
It happens only on php53s.