Its not just iceblade that does that, I have found that all (or most of) the elite skills or other players only gets absorbed by about 45%; thats what it used to absorb before they changed the absorb max to 99%. I guess that they forgot to change the absorb on the elites.
Well that's really lame, atleast I know that it wasn't just them, means I need to plan more accordingly based on classes, I've been using it as an oh-shit skills like immunes.
Then again though that's really something that should be fixed.