Sqlite3: UT8 support in migration in Rails?

Got the error:
"Migration error: Unsupported database for migration to UTF-8 support"
When trying to migrate data in Rails by using sqlite3.
Change db to mysql. It's ok but sql3 may contain error.
Use two links below may help ( not try it yet)
http://snippets.dzone.com/posts/show/6070
or
http://woss.name/blog/2006/10/25/migrating-your-rails-application-to-unicode.html