I came across an issue yesterday that involves the site registration and IRC.
It seems you can create a login name that has a space in it.
e.g. Klum Bunko.
The IRC will not accept spaces.
Suggestion, one or the other should change the acceptance, I beleive IRC is standard, no spaces.
Just like with users who have a non alpha character starting their user name, we've had to create exceptions for these types of users in the past. That's why 420 is IV20. I also wonder if the lack of spaces will bring about spaces being substituted by wild card symbols which brings up another issue all together... just my thoughts.