I'm running last version 1.1.1 and since the update i have troubles with user creation.
When i create a user with a "-" in the login, i have the error:
"The login must be between 3 and 100 characters long and contain only letters, numbers, or the characters '_' or '-' or '.' or '@'" even if my login respects the conditions (like "test-test").
Hope this helps.
thanks; already reported and fixed in trunk