Imported From: http://groups.google.com/group/in-portal-bugs/browse_thread/thread/558b5fb278fedab7#
When administrator have enabled registration by e-mail on website, then
Username field is no longer required.
This sounds good, but since we have username length validation always
enabled, then I still get "Field value length is out of range, possible
value length from 3 to 255" error for Username field.
Not sure if it's a problem made by user or by In-Portal. Since when
enabling by e-mail registration administrator also sees that 3-255 username
limit setting on the same page and ca change it to 0-255 and everything
will be ok.
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Best Regards,