title: Rails - ActionController::RoutingError (No route matches [GET] "/generic.png"):
body: <p>I recently updated my gemfile, and noticed the server logging the following in my dev environment - ActionController::RoutingError (No route matches [GET] "/generic.png")</p>
  
  <p>On production (Heroku) - I get the following - </p>
  
  <pre><code>Started GET "/users/generic.png"
  ActiveRecord::RecordNotFound (Couldn't find User with 'id'=generic):
  </code></pre>
  
  <p>Has anybody else encountered this? It's not breaking the app, but it is a mystery to me.</p>
  
  <p>I'm using devise and cancancan. I've run a search on my code, and the only place generic.png is mentioned that I can see is in the log, which makes me think it's buried somewhere in a gem.</p>