Sorts out a problem with the description field and adding users.

app/controllers/user_controller.rb

@@ -14,6 +14,7 @@ class UserController < ApplicationController
     @user = User.new(params[:user])
 
     @user.data_public = true
+    @user.description = "" if @user.description.nil?
 
     if @user.save
       token = @user.tokens.create