Bug tracker
"Limit Username chars" - does not seem to allow input when set to "Alphanumeric and s (fix completed in vcs)
PEACHES4U
peaches4u
[peachesu]
Peac[h]esu
The reported error is:-
"Username contains forbidden characters"
However:-
The - sign(minus/negative) works within a username and before and after the username.
The + sign(plus/positive) works within a username and before and after the username.
The _ sign(underscore) works within a username and before and after the username.