lucy24 - 11:05 pm on Jul 18, 2012 (gmt 0)
3. If the user agent doesn't contain at least one space, reject it
I've seen more of the opposite: Robotic UAs that contain multi-spaces like " " * in the middle. Can't remember a real human in that form.
* In the Forums, as in HTML, you keep the extra space from being eaten by judicious use of nonbreaking spaces ;)