Using Litespeed (http://litespeedtech.com) to host my site. Works fine locally using webrick.

Followed your instructions for installation + config.gem.

Here's a dump of the error log:

2009-05-14 13:42:33.336 [STDERR] /usr/lib/ruby/gems/1.8/gems/patientslikeme-campaign_monitor-1.3.0/lib/campaign_monitor.rb:260:in `p': Broken pipe (Errno::EPIPE)
2009-05-14 13:42:33.336 [STDERR] from /usr/lib/ruby/gems/1.8/gems/patientslikeme-campaign_monitor-1.3.0/lib/campaign_monitor.rb:260

    from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
    from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
    from /usr/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/active_support/dependencies.rb:155:in `require'
    from /usr/lib/ruby/gems/1.8/gems/rails-2.2.2/lib/rails/gem_dependency.rb:94:in `load'
    from /usr/lib/ruby/gems/1.8/gems/rails-2.2.2/lib/initializer.rb:281:in `load_gems'
    from /usr/lib/ruby/gems/1.8/gems/rails-2.2.2/lib/initializer.rb:281:in `each'
    from /usr/lib/ruby/gems/1.8/gems/rails-2.2.2/lib/initializer.rb:281:in `load_gems'
    from /usr/lib/ruby/gems/1.8/gems/rails-2.2.2/lib/initializer.rb:159:in `process'
    from /usr/lib/ruby/gems/1.8/gems/rails-2.2.2/lib/initializer.rb:112:in `send'
    from /usr/lib/ruby/gems/1.8/gems/rails-2.2.2/lib/initializer.rb:112:in `run'
    from ./config/environment.rb:26
    from /usr/local/lsws/fcgi-bin/RailsRunner.rb:66:in `require'
    from /usr/local/lsws/fcgi-bin/RailsRunner.rb:66