title: Ruby on Rails Rake assets:precompile error
body: <p>I'm new in Rails development and this is my first deployment to Heroku.
  When I execute my application (after the deployment) there is an error:</p>
  
  <pre><code>2011-09-18T21:05:54+00:00 app[web.1]: Completed 500 Internal Server Error in 10ms
  2011-09-18T21:05:54+00:00 app[web.1]:
  2011-09-18T21:05:54+00:00 app[web.1]: ActionView::Template::Error (application.css isn't precompiled):
  </code></pre>
  
  <p>I googled this and found that I have to precompile my assets, but when trying to do this I found an other error:</p>
  
  <pre><code>$ bundle exec rake assets:precompile RAILS_ENV=production
  rake aborted!
  No such process - /usr/lib/ruby/gems/1.8/gems/pg-0.11.0/lib/pg_ext.so
  
  (See full trace by running task with --trace)
  </code></pre>
  
  <p>I haven't found any solution for this issue. Is there anyone who faced this an know how to solve this problem?</p>