When attempting to create a PDF of an issue an internal error occurs. I think it is caused by the '–' character ("long dash":http://text-symbols.com/html/entities-and-descriptions/ or hyphen), because when I changed it to a standard dash '-' the PDF generated correctly.

In the log is the following:

Encoding::UndefinedConversionError ("\xE2" from ASCII-8BIT to UTF-8):
  lib/plugins/rfpdf/lib/tcpdf.rb:4346:in `unhtmlentities'
  lib/plugins/rfpdf/lib/tcpdf.rb:3542:in `block in writeHTML'
  lib/plugins/rfpdf/lib/tcpdf.rb:3509:in `each'
  lib/plugins/rfpdf/lib/tcpdf.rb:3509:in `writeHTML'
  lib/plugins/rfpdf/lib/tcpdf.rb:3620:in `writeHTMLCell'
  lib/redmine/export/pdf.rb:129:in `RDMwriteHTMLCell'
  lib/redmine/export/pdf.rb:681:in `block in issue_to_pdf'
  lib/redmine/export/pdf.rb:668:in `each'
  lib/redmine/export/pdf.rb:668:in `issue_to_pdf'
  app/controllers/issues_controller.rb:124:in `block (2 levels) in show'
  app/controllers/issues_controller.rb:116:in `show'

This is the output of @RAILS_ENV=production rake about@

About your application's environment
Ruby version              1.9.3 (x86_64-linux)
RubyGems version          1.8.11
Rack version              1.4
Rails version             3.2.11
Active Record version     3.2.11
Action Pack version       3.2.11
Active Resource version   3.2.11
Action Mailer version     3.2.11
Active Support version    3.2.11
Middleware                Rack::Cache, ActionDispatch::Static, Rack::Lock, #
, Rack::Runtime,
 Rack::MethodOverride, ActionDispatch::RequestId, Rails::Rack::Logger,
 ActionDispatch::ShowExceptions, ActionDispatch::DebugExceptions, ActionDispatch::RemoteIp,
 ActionDispatch::Callbacks, ActiveRecord::ConnectionAdapters::ConnectionManagement,
 ActiveRecord::QueryCache, ActionDispatch::Cookies, ActionDispatch::Session::CookieStore,
 ActionDispatch::Flash, ActionDispatch::ParamsParser, ActionDispatch::Head,
 Rack::ConditionalGet, Rack::ETag, ActionDispatch::BestStandardsSupport,
 OpenIdAuthentication
Application root          /var/www/redmine-2.2.2
Environment               production
Database adapter          mysql2
Database schema version   20121026003537