Help with Ruby on Rails

Hiya

Im trying to get RoR up and running. I have installed it through macports with the following commands

sudo port install ruby
sudo port install rb-rubygems

sudo gem install rails rake capistrano capistrano-ext libxml-ruby mongrel hpricot


Creating the rails application runs smoothly but when i try and start the server i get the following error:

=> Booting Mongrel (use 'script/server webrick' to force WEBrick)
=> Rails 2.2.0 application starting on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
** Starting Mongrel listening at 0.0.0.0:3000
** Starting Rails with development environment...
/Users/mircera/.gem/ruby/1.8/gems/RedCloth-4.0.4/lib/redcloth_scan.bundle: [BUG] Bus Error
ruby 1.8.7 (2008-08-11 patchlevel 72) [i686-darwin9]

Abort trap



Anyone who can help me sort out this problem?