There is a strange bug in Plesk which we found after upgrading to v 7.5.1. We have a domain1 with X ftp login and another domain2 with Y FTP login. We can login to the to X ftp using domain2 as host and vice versa. This shouldnt happen. Also the other issue : If there exists a webuser under domain1 with B login we cannot create the same webuser within domain2??? any idea how we can overcome this?