Thumbnail "title" tags wrong

All the thumbnail images are displaying correctly, but when you mouse-over a thumbnail, the title tag displayed for each thumbnail is the title of the current post page. Is there a way to change it so the thumbnails display the title tag for the page they link to?

See example here: http://theveganroad.com/recipes/caramelized-brussels-sprouts/

http://wordpress.org/extend/plugins/wordpress-23-related-posts-plugin/