#do I have the stupids today, or is this just a bit weird?

class Categorization < ActiveRecord::Base

  belongs_to :category
  belongs_to :categorized_content, :polymorphic => true
end

?> cat
=> #<Category id: 528, category_type_id: 1, parent_id: 219, name: "Brolgas", created_at: "2010-02-04 01:49:53", updated_at: "2010-02-04 01:49:53">
>> cat.categorizations
=> [#<Categorization id: 2, category_id: 528, categorized_content_id: 2, categorized_content_type: "Dataset", created_at: "2010-02-04 02:39:20", updated_at: "2010-02-04 02:39:20">]
>> cat.categorizations.first
=> #<Categorization id: 2, category_id: 528, categorized_content_id: 2, categorized_content_type: "Dataset", created_at: "2010-02-04 02:39:20", updated_at: "2010-02-04 02:39:20">
>> cat.categorizations.first.category
NoMethodError: You have a nil object when you didn't expect it!
You might have expected an instance of Array.
The error occurred while evaluating nil.include?
	from /Library/Ruby/Gems/1.8/gems/activerecord-2.3.5/lib/active_record/attribute_methods.rb:142:in `create_time_zone_conversion_attribute?'
	from /Library/Ruby/Gems/1.8/gems/activerecord-2.3.5/lib/active_record/attribute_methods.rb:75:in `define_attribute_methods'
	from /Library/Ruby/Gems/1.8/gems/activerecord-2.3.5/lib/active_record/attribute_methods.rb:71:in `each'
	from /Library/Ruby/Gems/1.8/gems/activerecord-2.3.5/lib/active_record/attribute_methods.rb:71:in `define_attribute_methods'
	from /Library/Ruby/Gems/1.8/gems/activerecord-2.3.5/lib/active_record/attribute_methods.rb:242:in `method_missing'
	from (irb):28
>>