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Sometimes I can't follow my own discussions between just me and myself... lol
What the thinking was is basically that if you submit a forum with a missing field (the Real Name one), than it might fill that in with a blank answer in the database. I tried it, and it left my name in the database and did not overwrite it with a blank space.
Easily said, I tried it and it worked. To be completely safe though, it is always a good idea to keep a back up of the files you edit, which in this case would only be the edituser.php file.