missing parts of head texture

[sjp]

We’re working with another group who has created a set of 10 avatars with 3dMeNow heads put through Peoplemaker. The avatar heads look fine on the computers at their location, but when sent to our location there are spots on the top of 4 of their heads where the proper texture is missing. Sometimes the area with the missing hair texture is solid black, other times it’s multi-colored as in the attached example image. (attaching images of the same avatar one from the other group's end which appears normal, one from our end with missing texture).
This has happened using both in Vizard R2.53f and R3 on our end.
Any ideas as to what might be going on? Thanks.