This has been fixed (and replaced with infinite scrolling)

Same here. So frustrating. I keep passing the first 5 tests but failing the last 2. Can someone give us a hint about the tree size in the last 2 tests, or what the final test results for the last 2 tests should look like? I am stuck.

I kept getting a Timeout Error until stopping using compact! method.

Same issue. An ajax request (http://www.codewars.com/users/USERNAME?page=1) will get an error 500 response from server:

<errors><error>Missing partial users/completed_code_challenges, application/completed_code_challenges with {:locale=&gt;[:en], :formats=&gt;[:html, :text, :js, :css, :ics, :csv, :png, :jpeg, :gif, :bmp, :tiff, :mpeg, :xml, :rss, :atom, :yaml, :multipart_form, :url_encoded_form, :json, :pdf, :zip], :handlers=&gt;[:erb, :builder, :slim, :coffee, :haml]}. Searched in:
  * &quot;/app/app/views&quot;
  * &quot;/app/vendor/bundle/ruby/2.0.0/bundler/gems/rails_admin_nestable-d5c7b9d01e69/app/views&quot;
  * &quot;/app/vendor/bundle/ruby/2.0.0/gems/rails_admin-0.4.9/app/views&quot;
  * &quot;/app/vendor/bundle/ruby/2.0.0/gems/kaminari-0.15.1/app/views&quot;
  * &quot;/app/vendor/bundle/ruby/2.0.0/gems/devise-3.1.0/app/views&quot;
</error><type>MissingTemplate</type></errors>

Same issue here. (Chrome Version 34.0.1847.116 m)