Gideon,
Please, please, extend the database column for the login username.
Now it is 20 chars, which is far to few. Maybe give 50 or 100 for a db column?
The column is qa_users > varchar(50) handle (for existing Q2A instances).
But you only need to change onle line of code in the file
qa-include/qa-db-maxima.php > line 37:
@define('QA_DB_MAX_HANDLE_LENGTH', 50);
Thank you in andvance.