I;ve not had it happen with other undead, I was doing some of the swamp quests down near APW with undead so I dont htink it's undead specific, perhaps it is zone specific.

I'll try and get down there tonight to verify.

~QTM

Had something similar in one of the  swampzones ,  big named treant, i flop, he walks away, i get up, he comes for me. Tried to shake him and didn't lose his agro till he was over a 100 metres away or so.
 Think it was 110 when i finally lost agro on the big bugger.
Heh, shoulda read opening post better, his situation was different, mobs seeing thru FD.
 I couldn't shake agro
 
Zarthaz

Seems FD split pulling is back out of the game.

Only rarely have i made a successfully split pull using both inviz and 4 mob trick. So if i remember correctly this is the 4th time Split pull mechanics have been changed  in VG what gives ...

The only zone where I've gotten split pulling to work decently is Rahz, due to the pathing issues the chunk already has currently.  I'm pretty sure I could have done it without FD as well.

Tonight, I died yet again to this bug. It said "Everyone thinks you're dead.", but none of the mobs were cleared from the aggro list. They all continued to beat on me for a few hits. I stood up, successfully FD'ed, same story. This is very, VERY annoying.

I would hope it's not intentional. It can already fail, meaning at high level a 80% mortality rate. If it gets seen though... that about reduces it to useless, even if just as an aggro reduction ability.
I've also gotten this particular bug in Rahz tonight while fighting near Rahluz. So it doesn't seem to be tied to a particular type of mob at all, it just occurs more in NN.

So far, it seems to occur when training 5+ mobs and then going FD, using RitW and/or Iron Skin, a martial sword and Stone Dragon stance. I'll gather more accurate info as I come across it.