I got a mysql_adapter 471 bug

I'm a greeen hand. I am learning ruby on rails by myself. However,
when I was tring to create the first demo website following the book
<<Agile_Web_Development_With_Rails>>, it reported that there was an
bug[segment fault] in the file "mysql_adapter.rb".
My OS:windows vista.
database: is mysql 5.0
rails: 2.0.2
ruby: 1.8.6 [i386-minwin32]
I used the command: "rails demo --database=mysql" to create the
"website"
And here is the original report: