Hello I want to share with you this, it might be a bug on the OM 5.0.0-M2 on the .tar.gz file on the official site and in the .iso file too. When you try to delete an user, you have the option "Purge" to completely delete the user but it leave a code on the row where used to be the information about that user on the Users List. This not happen in OM 4.0.0 and when you delete several users, the list start to seems a little "nasty" so I'm happy to share this with you and I hope this can be fixed soon.
Greetings to all. Jibsan.