Mac OS X asks for the full name of the user, after which it suggests a "short name" consisting of ASCII letters only. Perhaps if we did the same it wouldn't appear to be a bug. Unfortunately currently non-ascii characters in user names cause difficulties for email, and for remote logins where the input encoding may not be UTF-8. Also, the gdm login box should allow writing the full name instead of the user name, in case it doesn't already (haven't tried).
Mac OS X asks for the full name of the user, after which it suggests a "short name" consisting of ASCII letters only. Perhaps if we did the same it wouldn't appear to be a bug. Unfortunately currently non-ascii characters in user names cause difficulties for email, and for remote logins where the input encoding may not be UTF-8. Also, the gdm login box should allow writing the full name instead of the user name, in case it doesn't already (haven't tried).