Circlet of Shadow and FD

[Lysander]

So I was fighting a mob over level 35, and FD'ed and I thought I would be good if I stood up and clicked the circlet. Unfortunately the mob reaggroed and murdered me.

I read from this guide that: "If a mob cannot see invis and you invis right after standing up (eg, a Ring of Shadows click), it should clear aggro. This is how Necros and SKs clear aggro using a Circlet of Shadow. Since monks don't get infinite charge invis items, this isn't used much in practice, and I have not personally tested this (or whether an invis while FDed from a groupmate would work). "

(from http://wiki.project1999.com/Meviin%27s_Monk_Mechanics)

Sesserdrix also says something similar: "Second thing this item lets you do is helpful in bad situations. Lets say you pull three mobs by accident, and you're getting beaten down. Your reaction will be to Feign Death, of course, but then what... You sit there... And you wait. And you wait. And finally, after a while, the enemies will return from whence they came. But, with the power of Circlet of Shadow, you can stand up immediately after Feign Death, click your cap, and sit down and meditate. Note, if your enemies can see through invisibility, you cannot do this, as they will re-aggro you."

So did this change? I saw that patch which said that sneak clearing aggro on monks was nerfed, was it nerfed along with this? Or did it never work like this at all? Or am I not using the circlet right. And last thing is, is this classic? Without doing any research, I see lots of people on allakhazam claiming that clicking a circlet after standing up made the mob not reaggro on them, which suggests to me that that is how it should work, presuming that they were fighting mobs above lvl 35.

Looking to hear from other necros about the uses of this item besides just completely safe invis that doesn't drop when you need it most.