I had this issue after upgrading from ubuntu 9.10 (karmic) to 10.4 (lucid). the solution was to libmysqlclient16-dev:
sudo aptitude install libmysqlclient16-dev -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.

