bad behavior on invalid nickname

[hef]

from http://dev.bukkit.org/server-mods/irctransport/?comment=17:

There seems to be some random and unknown derp happening where a user's nickname gets changed to something that can't be used.

[SEVERE] Could not log into the IRC server: :irc.something.net 432 69SAAAA3G 69SAAAA29 :Erroneous Nickname

I don't know what's causing this. It has happened twice in many months so thankfully it doesn't happen often. Deleting IRCTransport.db fixes this.