Make sure headhuman.tri and such aren't doing it under Meshes\Characters\Imperial. Bad head meshes can do that, I'm pretty sure.
I will look at this on Saturday.
That's really odd. Can you post a mod list? Preferably with Wrye Bash or OBMM.
I have about 100 mods. I am not sure it is worth it.
If I cannot find anything wrong with the head meshes... I am just going to rename my current Oblivion game folder and the Oblivion folder under the "My Games" folder and try a fresh install. I will use obmm to restore all the mods. I will do 10 at a time then start a new game to see if any these are the culprit.
When I ran my test with all mods deactivated the problem persisted. It is possible there is something that obmm could not deal with upon deactivation. I will report back with any news of success or failure.
Thanks showler and Itachi62