Likely error from the upgrade and merging of the emoticons.
Ran these queries and it cleaned up the database.
Whistle
UPDATE `forums_posts` SET `post` = REPLACE( post, 'Large_whistle.gif', 'Extras_whistle.gif' )
Nod Head
UPDATE `forums_posts` SET `post`= replace(post, 'Large_nod%20head.gif', 'Extras_nod head.gif')
Big Grin
UPDATE `forums_posts` SET `post`= replace(post, 'Large_biggrin.png', 'Extras_biggrin.png')
Edited by Square Wheels