Wow. I really don't know why that happens.
Which Windows or Mac version do you use? What's your graphic card (see
http://www.ootpdevelopments.com/boar...d.php?t=142103)?
Please add the parameter debugfacegen (see
http://www.ootpdevelopments.com/boar...d.php?t=145561) and start OOTP. Generate a picture and then close OOTP. Locate the folder /My Documents/SI.../OOTP.../data/facegen and zip all the files which start with "debug_" and email them to me.
Thank you!