User blog comment:Ajraddatz/Article comments/@comment-4636093-20120920181507/@comment-4499980-20120921220014

Just a side note, the patch notes aren't worded properly about the Sheen/TF/LB proc on E. This was a bug-fix, not a buff. E, as an ability, should have always proc'd the effects, but it didn't. They made it proc it, but as all other abilities (excluding autoattack modifiers) it does not consume it (it does not apply the bonus damage, it only prepares the "buff" for use with his next auto-attack).