[rt-users] Invalid username

[Mario Giammarco]

Hello,
I have just tried request tracker 4.0.1 on Ubuntu and 4.0.5 
on Debian, the result 
is the same.

I create an user "foo" and when I try to add the user to
 a queue, a custom field 
I fill the text box with the username and I get always
 "invalid username".

Proably related to this: when I create a custom field 
for tickets in the "new 
ticket" of user "foo" there is no custom field.

But if I create the ticket I get an error 
"failed validation" because I put a 
regular expression for the ticket field.

So it seems that the field is not shown but is present.

Can you help me?

Mario