Burden of time and Undead (bug?)

[Valandil]

random afflictions from BoT. They shouldn't be affecting undead though...

[zepath]

I've used the same strategy before in SP. That is, LA Ermor casting Burden of Time, and either something has changed since 3.00 to make the spell affect undead (wrongly) or I was especially lucky when using this in the past because I do not remember such serious problems afflicting my undead under the spell.