Why the Dark Lord wanted Dumbledore killed (was Why Dumbledore Had to Die

[Arley Dotinei]

No: HPFGUIDX 150896

I hope I'm not discussing something old, but it occurred to me that perhaps the Dark Lord had some hidden agenda in asking for Dumbledore's demise besides the obvious. I mean, if I had plans to rule the Wizarding world, of course I'd want someone like Dumbledore out of the way, but could there be something more? So, does anyone think he might have had something specific in his Dark mind when he asked Draco to kill Dumbledore? Or was it just a way to punish Draco for Lucius' fiasco, get rid of the old coot (Albus) and leave the path open to finally vanquish that annoying boy (Harry)?
   
  Or am I just seeing things where they aren't?
   
  Puzzled,
  Arley