Actually yes, I am pretty sure Memblur spells do have this problem lol. I just happened to be looking into something else last night and noticed the effect for memblur only wiping the hate list for NPCs. Which should mean that Memblur works for the first time currently in SVN since the hate lists were removed from players. But I posted a fix for it to work (I think it should anyway) even with hate lists being added to players as well as NPCs. So, that should resolve that issue and one other Memblur issue too I hope.
http://www.eqemulator.net/forums/showthread.php?t=26528
Funny that you posted this shortly after I posted that Memblur fix lol.