安装好Ruby on Rails 2.3.3后，运行简单的页面提示如下错误“The bundled mysql.rb driver has been removed from Rails 2.2. Please install the mysql gem and try again: gem install mysql”
gem 了n次也不成，搞了一早上，才google到一个比较山寨的方法解决
1. download older MySQL client library, for example one from InstantRails: http://instantrails.rubyforge.org/svn/trunk/InstantRails-win/InstantRails/mysql/bin/libmySQL.dll 2. copy the downloaded file to C:\Ruby\bin (or wherever you installed Ruby) 3. restart MySQL server
另参考：http://www.ruby-forum.com/topic/160358和http://rdc.taobao.com/blog/qa/?p=523
