An unhelpful Octopress error log. It look like a problem with the ruby versions or with something in Psyche. But psyche its not! This error comes from added '@' in front of your twitter handle in the _config.yml file.

octopress-psyche

/path/to-the-rubies/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/psych.rb:203:in `parse': (/path/to-the-rubies/Blog/_config.yml): found character that cannot start any token while scanning for the next token at line 72 column 15 (Psych::SyntaxError)
  from /path/to-the-rubies/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/psych.rb:203:in `parse_stream'
  from /path/to-the-rubies/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/psych.rb:151:in `parse'
  from /path/to-the-rubies/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/psych.rb:127:in `load'
  from /path/to-the-rubies/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/psych.rb:297:in `block in load_file'
  from /path/to-the-rubies/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/psych.rb:297:in `open'
  from /path/to-the-rubies/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/psych.rb:297:in `load_file'
  from /path/to-the-rubies/.rvm/gems/ruby-1.9.3-p429/gems/jekyll-0.12.0/lib/jekyll.rb:130:in `configuration'
  from /path/to-the-rubies/.rvm/gems/ruby-1.9.3-p429/gems/jekyll-0.12.0/bin/jekyll:221:in `<top (required)>'
  from /path/to-the-rubies/.rvm/gems/ruby-1.9.3-p429/bin/jekyll:19:in `load'
  from /path/to-the-rubies/.rvm/gems/ruby-1.9.3-p429/bin/jekyll:19:in `<main>'
  from /path/to-the-rubies/.rvm/gems/ruby-1.9.3-p429/bin/ruby_noexec_wrapper:14:in `eval'
  from /path/to-the-rubies/.rvm/gems/ruby-1.9.3-p429/bin/ruby_noexec_wrapper:14:in `<main>'