MS IZ renamed the array

app/controllers/users_controller.rb

@@ -2,7 +2,7 @@ class UsersController < ApplicationController
   before_filter :authenticate_user!, :except => [:new, :create]
   def index
 
-    @group_array = current_user.groups.collect{|x| [x.to_s, x.id]} 
+    @groups_array = current_user.groups.collect{|x| [x.to_s, x.id]} 
 
     unless params[:q]
       @people = Person.all

app/views/users/index.html.haml

@@ -21,6 +21,6 @@
         -else
           %td
             = form_for Request.new do |f|
-              =f.select(:group_id, @groups_array)
+              = f.select(:group_id, @groups_array)
               = f.hidden_field :destination_url, :value => person.email
-              =f.submit
+              = f.submit