[Plugin: Yet Another Related Posts Plugin] The last update (3.0.3) breaks latin characters on post t

The last update (3.0.3) breaks latin characters on post title and body.

If you write characters as á é í ó ú or ñ, when you save the draft, they appears as:
� � � � � or �

I believe that the plugin doesn’t send the characters as UTF-8 or similar.