I\'ve got a database with a bunch of broken utf8 characters scattered across several tables. The list of characters isn\'t very extensive AFAIK (áéíúóÁÉÍÓÚÑñ)
Fixing
I fixed with
UPDATE wp_zcs9ck_posts_copy SET post_title = CONVERT(BINARY CONVERT(post_title USING latin1) USING utf8);
Complete solution: http://jonisalonen.com/2012/fixing-doubly-utf-8-encoded-text-in-mysql/