After migrating the Moodle server, the new server seemed to work OK until trying to manually add a user. I was deleting users OK thru the admin account, but then tried the add user and it was not showing up after a browse all users.
To migrate, there were some instructions on the web that detailed using RSYNC to copy moodledata and moodle directories, then dumping existing database, moving and importing into database on new server.
On the new server, it is possible to delete users and to modify a user's profile by updating a field and those changes were preserved. When adding new users, it may add it in the database, but its not showing up. When trying to add again it says the username already exists.
Moodle Version 2.5+
Have migrated from Ubuntu 12.04.2 LTS to 12.04 LTS (both hosts are virtualized - moved from Parallels Desktop ==> VMware)