LordPeter is providing a
compatibility patch module for CK2+, but it's not up to date yet. So you'll have to wait.
Delete celtic_male_nose_1, 2, and 3.dds and celtic_female_nose_1,2, and 3.dds, found in HIP folder/gfx/characters/celtic_male and /celtic_female, respectively. To be precise, English portrait pack doesn't use Celtic noses, so it will remain unaffected.
Note that this solution does not work in all instances. This solution works only if the numbers of frames in the original and CPRplus files happen to be the same.
I'm sure you did this already too, but just make sure that you have default_son_
western.tga and default_daughter_western.tga, not something like default_son_
german.tga!
*Edit*
Also, make sure to delete alignment adjustment values found in western_male_beard... entries.