I just noticed that Wizards of the Coast released their errata to Libris Mortis on their website today. The link is http://www.wizards.com/default.asp?x=dnd/er/20040125a. I, for one, am glad to see it. However, I don't see any mention of the summon undead spells, which should have been changed since skeletons and zombies are templates in 3.5. (Apparently the errata list is not yet all-inclusive.)
Johnathan
Johnathan